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GM CHEVY LS SERIES block
Part Material Deck Bore Main Cap Crankshaft Oiling Rear Main
Main Max Max Hp Usage Origin Page Number Height Bolt
Material Jnl Dia. Seal Bulkhead Stroke Number
12561166
Alum 9.240" 3.89" 6 Nodular Std. LS (2.56) Wet/Dry 1 pc
Solid 4.125" 450 Street LS1/LS6 222
12572808
Iron 9.240" 3.98" 6 Nodular Std. LS (2.56) Wet/Dry 1 pc
Solid 4.125" 500 Street LQ9 222
12568950
Alum 9.240" 4.00" 6 Nodular Std. LS (2.56) Wet/Dry 1 pc
Solid 4.125" 450 Street LS2 223
12584727
Alum 9.240" 4.065" 6 Nodular Std. LS (2.56) Wet/Dry 1 pc
Windowed 4.125" 500 Street L92 223
17802854
Alum 9.240" 4.125" 6 Steel Std. LS (2.56) Wet/Dry 1 pc
Windowed 4.125" 500 Street LS7 224
25534427
Alum 9.240" 4.125" 6 Steel Std. LS (2.56) Wet/Dry 1 pc Solid
4.125" 500+ Street LS7 224
12480030
Alum 9.240" 4.117"4.160" 6 Steel Std. LS (2.56) Wet/Dry 1
pc Windowed 4.125" 900 Pro C5R 225
19166454
Iron 9.260" 3.990"4.250" 6 Nodular Std. LS (2.56) Wet/Dry 1
pc Windowed 4.250" 1000+ Pro/Am LSX 227
GM took a chance with the LS engine. They stayed true to the
pushrod small-block and continued to develop this technology
to the point that building a daily-driven, 500-plus
horsepower car is no big deal. The GM Performance Parts LS
Series cylinder block are designed specifically for late
model small-block engines that run the LS Family cylinder
heads. These include the LS1, LS2, LS4, LS6, LS7, LQ4, LQ9,
and L76. Our LS block selection ranges from a stock
replacement all the way up to our LSX Bowtie block designed
to support 2500 horsepower!
  A.
12561166
LS1/LS6
5.7L Bare Block
Direct replacement for
20012004 LS1 and LS6 Corvette 5.7L
Production 319-T5 aluminum block with iron sleeves
Production oiling system
6-bolt iron main bearing caps
9.240" deck height
Use LS1/LS6 cylinder heads only
3.89" finished bore (99.0mm)
No provision for Active Fuel Management
Tested to over 400 hp!
12572808
LQ9 Cast Iron 6.0L Bare Block (not shown)
Direct replacement for
19982004 LQ4 and LQ9 Truck and SUV 6.0L
Production cast iron block
Production oiling system
6-bolt iron main bearing caps
9.240" deck height
Use only LS1, LS6, LS2 or L76 cylinder heads
4.00" finished bore (101.6mm)
No provision for Active Fuel Management
Tested to over 500 hp!
  
12568950
LS2 Aluminum 6.0L Bare Block (not shown)
Direct replacement for 20052007 LS2 Corvette, SSR, GTO
6.0L, and Trailblazer SS
Production 319-T5 aluminum block with iron sleeves
Production oiling system
6-bolt iron main bearing caps
9.240" deck height
Use only LS1, LS6, LS2, L76 or C5R cylinder heads
4.00"
finished bore (101.6mm)
Provisions for Active Fuel Management
Great for stroker cranks for even more cubes
Tested to over 450 hp!
12584727
NEW
L92 Aluminum 6.2L Bare Block (not shown)
Direct replacement for 2007 L92 6.2L
Production aluminum block with iron sleeves
Production oiling system
6-bolt iron main bearing caps
9.240" deck height
Use only LS1, LS6, LS2, L76 or C5R cylinder heads
4.065"
finished bore (103.25mm)
Great for stroker cranks for even more cubes
The LS Series block Continued
17802854
LS7 7.0L Corvette Bare Block (not shown)
Direct replacement for
20062007 7.0L LS7 engine
Production 319-T5 aluminum block with pressed-in
iron sleeves
Production oiling system
6-bolt dowel located steel main bearing caps
9.240" deck height
For use with any LS series head
4.125"
finished
bore (104.78mm), deck plate honed
Siamese cylinder bores for large bore size
No provision for Active Fuel Management
Based on C5R block development
Tested to over 500 hp!
Parts required to complete your LS7 Block
PART NUMBER QTY DESCRIPTION
12570471
1 Valley cover
12598292
1 Front cover assembly
21007339
4 Plug
12556437
1 Camshaft retainer
11609289
1 Plug
11610259
1 Plug, cylinder head
12551177
5 M8x1.25 flanged hex head bolt
12570326
4 Dowel, cylinder head locating
12572013
1 Rear cover assembly
12573460
1 Oil plug
12596334
1 Windage tray
11588426
2 Plug
09427693
4 Plug
01453658
2 Dowel, bell housing locating
12561663
1 Plug
12573107
1 Oil pressure sensor
12585546
1 Crankshaft position sensor
25534427
NEW
LS7 Bare Block with Solid Main Bulkheads (not shown)
319-T5 aluminum block
with pressed-in iron sleeves
Production oiling system
6-bolt dowel located steel main bearing caps
9.240" deck height
For use with any LS series head
4.125"
finished bore (104.78mm),
deck plate honed
Siamese cylinder bores for larger bore sizes
No provision for Active Fuel Management
Fully machined with caps and pressed-in liners
Limited availability
Perfect for racing dry-sump applications
Made to LS7 production standards for machining and
cleanliness
Based on C5R block development
Tested to over 500 hp!
      A.
12480030
Aluminum C5R Racing Block
This is the ultimate race version of the aluminum LS block,
which enjoys the state-of-the-art technology necessary to
build an LS engine to over 440 cubic inches, and 900
horsepower! Our C5R race block has seen serious race time
(including wins at LeMans, GT-S, and the 24 hours of
Daytona). If you are building a big small block for your
late model Camaro, Firebird, or Corvette, this is the
aluminum block for you.
Premium hipped and x-rayed 356-T6M aluminum block
Production oiling system
6-bolt SAE 8620 dowel located steel main bearing caps
SAE 4340 premium main cap fasteners
9.240" deck height
For use with LS1, LS6, LS2, L76, LS7 and C5R cylinder
heads
C5R spec, special material cylinder liners
Siamesed water jackets for larger bore size
4.117" finished bore
4.160"
max bore
Standard camshaft location and bore sizes
100% CMM measured for accuracy Completely blueprinted
and squared
Included 4340 premium head studs
AN O-ring plugs throughout
Capable of over 900 horsepower!
GM LSX BOWTIE BLOCK
NEW
The next generation of high performance GM block has been
released! Its the amazing LSX Bowtie Block, designed from
the ground up to deliver maximum value while providing you
with the foundation to build the LS engine of your dreams.
GM Performance Parts, working with NHRA Pro Stock legend
Warren The Professor Johnson, designed the LSX block to be
the ultimate high performance LS block. Our goal was to
bring the LS community race block technology at street car
prices. Just like every engine part in the GM Performance
Parts portfolio, the LSX Bowtie Block is held to the highest
industry standards for tolerances, materials, and
construction. We think that youll find the LSX to be the
ultimate in high performance LS engine blockcheck out these
features:
100% CNC Machined Cast Iron
True Priority Main Oiling
6 Head Bolts per Cylinder
Standard 4.400" Bore Spacing
Extra Thick Siamese Cylinder bores
Fully machined bores, ready to hone to fit
Semi-finished, machined decks, ready to be decked to your
specs
Increased Deck Thickness
LS7 Style 6-Bolt dowel located main bearing caps
Wet Sump and Dry Sump Capability
Deep Skirted Head Bolt Holes (same as OEM aluminum block)
All stock bolt holes are stock thread size
Maintains all OEM LS family exterior mounting features
Front Motor Plate Mounting Holes Added
Added Material around Cam Bearings for Additional Strength
8mm exterior/interior 5th and 6th head bolt holes
All 5 cam bores machined for bearing P/N 12453169
Standard .842" lifter bores
Screw-in soft plugs
Accommodates any LS small block oil pan and oil pump
External oil pump feed at rear of block
Main web bay to bay breathing holes for increased HP
Access windows for cylinder head stud access (intake side)
Extra breathing pocket added near starter for better
windage
Includes Unique New Cam Retainer, Rear Cover, Lifter
Retainers and OEM replacement Cam Bearings
19166454
LSX Bowtie Block (Standard Deck)
3.990" finished Siamese Cylinder Bores
(ready to be honed to your specifications)
9.26" semi-finished standard Deck Height (ready to be
decked to your specifications)
Max 4.250" recommended Stroke
Capable of 364 to 482+ cid
Orange Powder Coat finish
Accepts all Gen III & IV LS Heads, Cranks, Cams, Etc.
Approximate Finished Weight: 225 Lbs. (Standard deck)
The LSX Block includes the following:
19166177
Cam Thrust Plate
19166178
Rear Cover
19166182
Tappet Guide
For the advanced LSX competition engine builder, you will
fully enjoy reading the following features of the new LSX
Bowtie Block:
Front oil feed holes can be plugged/restricted for
mechanical
flat tapped or mechanical roller lifter applications
Can be machined safely to 9.20" deck height
Main Bearing Cap bolt threads can be machined for
aftermarket premium 12mm fasteners
Maximum 4.250" bore at .200" minimum wall thickness
(naturally aspirated applications)
6-bolt head bolt pattern (for boosted applications)
Machined for 8mm Inner and outer 5th and 6th head bolts
Standard bolt holes can be machined for 1/2" studs
Cam bores can be machined to accept 60mm roller bearings
Can be machined for larger diameter lifters and/or 1.060"
bronze bushings
Front oil feed lines can be plugged and external oil pump
and/or aftermarket dry sump systems can be used via oil pump
feed at rear of blockmay be required with certain large
stroke/aluminum rod combinations
Belt cam drive systems can be accommodatedsome machining
will be required
External oil pump feed at rear of block
7th transmission bolt hole has been added (per early SBC),
stud can be installed for sanctioning body requirements
Front motor plate can be used for racing chassis
applications (sprint car, drag racing, truck pulling, etc.)
Threaded water plugs can be used for external heaters or
coolers
The LSX block made its public debut at the 2006 SEMA show in
the Reggie Jackson 69 Camaro project cara joint effort
between GM Performance Parts and GM Performance Division.
This car also starred in a Hot Rod TV episodethe first to
air on ESPN. The engine that powers this amazing evolved
Camaro features a 454-cubic-inch LSX short block, prototype
LSX cylinder heads, an LS7 carbureted intake manifold, a
pump gas-friendly compression ratio, and over 640
horsepower. This is just a sample of what you can do with
your own LSX block!
Look for the LSX block to spawn LSX-specific cylinder heads,
intakes, cams, and crate engines. And, watch for GM
Performance Parts to continue to lead the industry in
value-based high performance
engine block, components, and crate engines.
  |
LS Bare Block
Completion Kit -
Sample Kit Pictured
 |
|
LS 3 Bare Block Completion Basic
|
Part # |
Qty |
Part Description |
|
12599296 |
1 |
Valley Cover w/ bolts, seals, gasket and pcv
baffle |
|
12599298 |
1 |
PCV Tube |
|
12600325 |
1 |
Front Cover w/ Cam Sensor, Seal, Bolts &
Gasket |
|
12602548 |
1 |
Coolant Crossover Pipe |
|
12602540 |
2 |
Coolant Caps |
|
11588714 |
4 |
Coolant Pipe/Cap Bolts |
|
12615666 |
1 |
Rear Crankshaft Seal Housing |
|
12574293 |
1 |
Rear Crankshaft Seal Housing Gasket |
|
11515758 |
12 |
Rear Crankshaft Seal Housing Bolts |
|
89060436 |
1 |
Rear Crankshaft Seal |
|
12573460 |
1 |
Oil Galley Rear Plug w/ Seal |
|
11588949 |
2 |
Oil Plug Side |
|
9427693 |
4 |
Water Drain Plug Frt |
|
1453658 |
2 |
Transmission Dowel |
|
11609289 |
1 |
Water Drain Plug - Hex |
|
12589016 |
1 |
Camshaft Retainer Plate |
|
11561455 |
4 |
Camshaft Retainer Plate Bolt |
|
|
|
LS 3 Bare Block Completion w/ Sensors
|
Part # |
Qty |
Part Description |
|
12599296 |
1 |
Valley Cover w/ bolts, seals, gasket and pcv
baffle |
|
12599298 |
1 |
PCV Tube |
|
12600325 |
1 |
Front Cover w/ Cam Sensor, Seal, Bolts &
Gasket |
|
12602548 |
1 |
Coolant Crossover Pipe |
|
12602540 |
2 |
Coolant Caps |
|
11588714 |
4 |
Coolant Pipe/Cap Bolts |
|
12615666 |
1 |
Rear Crankshaft Seal Housing |
|
12574293 |
1 |
Rear Crankshaft Seal Housing Gasket |
|
11515758 |
12 |
Rear Crankshaft Seal Housing Bolts |
|
89060436 |
1 |
Rear Crankshaft Seal |
|
12573460 |
1 |
Oil Galley Rear Plug w/ Seal |
|
11588949 |
2 |
Oil Plug Side |
|
9427693 |
4 |
Water Drain Plug Frt |
|
1453658 |
2 |
Transmission Dowel |
|
11609289 |
1 |
Water Drain Plug - Hex |
|
12589016 |
1 |
Camshaft Retainer Plate |
|
11561455 |
4 |
Camshaft Retainer Plate Bolt |
|
12570125 |
2 |
Knock sensor |
|
12585546 |
1 |
Crankshaft Position Sensor |
|
11515756 |
1 |
Crankshaft Position Sensor Bolt |
|
|
|
LS3 Bare Block Completion w/ Sensors and Timing
Components
|
Part # |
Qty |
Part Description |
|
12599296 |
1 |
Valley Cover w/ bolts, seals, gasket and pcv
baffle |
|
12599298 |
1 |
PCV Tube |
|
12600325 |
1 |
Front Cover w/ Cam Sensor, Seal, Bolts &
Gasket |
|
12602548 |
1 |
Coolant Crossover Pipe |
|
12602540 |
2 |
Coolant Caps |
|
11588714 |
4 |
Coolant Pipe/Cap Bolts |
|
12615666 |
1 |
Rear Crankshaft Seal Housing |
|
12574293 |
1 |
Rear Crankshaft Seal Housing Gasket |
|
11515758 |
12 |
Rear Crankshaft Seal Housing Bolts |
|
89060436 |
1 |
Rear Crankshaft Seal |
|
12573460 |
1 |
Oil Galley Rear Plug w/ Seal |
|
11588949 |
2 |
Oil Plug Side |
|
9427693 |
4 |
Water Drain Plug Frt |
|
1453658 |
2 |
Transmission Dowel |
|
11609289 |
1 |
Water Drain Plug - Hex |
|
12589016 |
1 |
Camshaft Retainer Plate |
|
11561455 |
4 |
Camshaft Retainer Plate Bolt |
|
12570125 |
2 |
Knock sensor |
|
12585546 |
1 |
Crankshaft Position Sensor |
|
11515756 |
1 |
Crankshaft Position Sensor Bolt |
|
12591689 |
1 |
Cam Gear |
|
11561283 |
1 |
Cam Gear Bolt |
|
12556582 |
1 |
Crank Gear |
|
12586482 |
1 |
Timing Chain |
|
12588670 |
1 |
Timing Chain Dampener/Slide w/Bolts |
|
12601402 |
1 |
Balancer |
|
12557840 |
1 |
Balancer Bolt |
|
12595365 |
4 |
Valve Lifter Guides |
|
12551163 |
4 |
Valve Lifter Guides Bolts |
|
|
|
| |
|
|
| |
|
|
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GM
CONNECTING RODS &
COMPONENTS
 12568734
19972004 Connecting
Rod
Connecting rod for
use on all 1997
2004 production
Corvettes and
19982002 Camaro/Firebird
6.098" C-C length
Sold individually
12577583
LS2
Connecting Rod (not
shown)
Connecting rod used
in 20052007 LS2
engines has
bronze bushing
6.098" C-C length
Sold individually
11610158
LS6
Rod Bolts (not
shown)
Recommended for use
in performance Gen
III engines
Bolts have greater
strength than
pre-2000 rod bolts
One bolt per
package. Order two
per connecting rod.
 12586258
LS7
Connecting Rod
Titanium connecting
rod used in
20062007
LS7
crate engines
6.067" C-C length
Sold individually
11609825
LS7
Connecting Rod Bolt
Kit
Required for LS7
engine builds
Includes 16 bolts |
|
GM
PISTONS & RINGS
GM
Performance Parts
pistons are top
quality and are
ready for the rigors
of high-performance
street and
competition
applications.
Theyre factory
tested, so you know
youre getting the
right parts for your
LS Series engine.
Pistons are sold
individually unless
otherwise specified.
GM LS
SERIES RINGS
Part
Number Bore Size
Oversize Ring
Thicknesses
Description
12499234
3.898" 1.5, 1.5,
2.5mm Set of 8 ring
packs, standard size
for LS1 & LS6
12499236
4.000" 1.5, 1.5,
2.5mm Set of 8 ring
packs, standard size
for 1999-2005 LQ4 &
LQ9
12499235
3.780" 1.5, 1.5,
2.5mm Set of 8 ring
packs, standard size
for 1999-2005 5.3L
engines
89017484
4.000" 1.2, 1.5,
2.5mm Production
ring pack for
'05-'06 LS2, '06 L76
88894243
4.000" 1.5, 1.5,
2.5mm Production
ring pack for
'05-'06 LQ9
89017776
4.125" 1.2, 1.2,
2.0mm Production
ring pack for '06
LS7
89017777
4.125" +.020" 1.2,
1.2, 2.0mm Oversize
LS7 ring pack |
|
GM
CRANKSHAFTS
 A.
89017522
Crankshaft Assembly
19972004
Nodular cast 3.622"
stroke crankshaft
assembly has
24X
reluctor wheel
installed
Used on 19982002
F-cars and 19972005
Corvettes
12588612
LS2
Crankshaft Assembly
(not shown)
Nodular cast 3.622"
stroke crankshaft
assembly has
58X
reluctor wheel
installed
Used on 20062007
Corvettes
12568820
LS7
Forged Steel
Crankshaft (not
shown)
Forged 4" stroke
crankshaft for LS7
engine
Includes 58X
reluctor wheel
 B.
12559353
Reluctor Wheel, 24X
24-tooth crankshaft
position sensor
timing wheel for
19972005 engines
12586768
Reluctor Wheel, 58X
(not shown)
58-tooth crankshaft
position sensor
timing wheel for
20062007 engines
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THE GM LS FAMILY ALUMINUM
HEADS
The LS Family of GM
engines has continued our tradition of
raising the power potential of the
legendary small-block V-8. The LS6
cylinder head came as standard equipment
on the amazing 405-horse Z06 Corvette
and the 2005 Corvette with the LS2
engine. These heads can be installed on
any 1997-2005 LS Family of V-8 engines
(except 4.8L & 5.3L versions), and the
GM Performance Parts engineers have even
designed fully-CNC-ported versions to
get your late model GM engine screaming
right along. Our complete assemblies
come with bee-hive valve springs and
light weight hollow stem
valvesinnovations that our competitors
have had to copy to catch up to our
designs. Weve already done the
validation of these heads in competition
in our show room stock C5R Corvette
racecar, so you can be assured our LS6
race heads will live up to your demands.
Aluminum LS Family Head
Technical Notes:
Aluminum 356-T6
High efficiency combustion chambers
Symmetrical intake and exhaust ports
(not mirrored like Gen I small block)
Angled spark plugs, (14mm, 5/8" hex,
3/4" reach, taper-seat plugs)
15 valve angles (except C5R and LS7)
Bolt-down type rocker arms
Center-bolt pattern valve covers
required
Will not work on Gen I or Gen II
small-block
LS Series Cylinder Heads
Part Description Material
Port Port Valve Chamber Int Exh Plug
Heat Rocker Notes Page Number Size Type
Angle CC's Vlv Vlv Type Riser Stud
Number
12480005
C5R 1st design Aluminum
210 Rec C5R 11 deg 38 2.18 1.63 Angled
No Shaft As-cast, no seats/guides N/S
12480090
C5R 2nd design Aluminum 210 Rec C5R 11
deg 30 2.18 1.63 Angled No Shaft
As-cast, no seats/guides 230
12564824
Stock LS6 Aluminum 210
Cath 15 deg 64.5 2.00 1.55 Angled No
Bolt Hollow/sodium filled valves 228
88958622
CNC LS6 Aluminum 250 Cath 15 deg 61.9
2.00 1.55 Angled No Bolt 11.2
compression 228
88958665 CNC LS6 Aluminum
250 Cath 15 deg 65 2.00 1.55 Angled No
Bolt 10.5 compression 228
12564825
Bare LS2 & LS6 Aluminum
210 Cath 15 deg 64.5 2.00 1.55 Angled No
Bolt Bare LS2/LS6 228
12576063
Stock LS2 Aluminum 210
Cath 15 deg 64.5 2.00 1.55 Angled No
Bolt Solid stem valves 229
88958765
CNC LS2 Aluminum 250 Cath 15 deg 64.5
2.00 1.55 Angled No Bolt Solid stem
valves 229
12582714
Bare L92 Aluminum 260 Rec
L92 15 deg 70 2.16 1.59 Angled No Bolt
Bare L92 229
12582713
L92 Aluminum 260 Rec L92 15 deg 70 2.16
1.59 Angled No Bolt Solid stem valves
229
12578450 Bare LS7 Aluminum
270 Rec LS7 12 deg 70 2.20 1.61 Angled
No Bolt Bare LS7 230
12578449
Stock LS7 Aluminum 270
Rec LS7 12 deg 70 2.20 1.61 Angled No
Bolt Titanium/sodium filled valves 230
25534428
As-cast LS7 Aluminum
Rec LS7 12 deg 66 2.20 1.61 Angled No
Bolt As-cast, bare head 230
 A.
12564824
LS6 Cylinder Head
Assembly
Fits any 1997-2007 LS
Family engine*
2.00" hollow stem intake, and
1.55sodium filled exhaust valves
.570" max valve lift
210cc Cathedral port intake ports
70cc D-shaped exhaust ports
65cc combustion chambers
Bare head P/N 12564825 available
separately 
88958665
CNC-Ported LS6 Cylinder
Head Assembly (not shown)
CNC-ported aluminum
performance head
Fits any 1997-2007 LS family engine*
2.00" Hollow stem intake, and 1.55"
sodium filled exhaust valves
.570" max valve lift
250cc CNCd Cathedral port intake
ports
85cc CNCd D-shaped exhaust ports
65cc CNCd combustion chambers
Bare head P/N 12564825 available
separately
88958622
CNC-Ported LS6 Racing
Cylinder Head Assembly (not shown)
CNC-ported aluminum
racing head
2.00" Hollow stem intake, and 1.55"
sodium filled exhaust valves
.570" max valve lift
250cc CNCd Cathedral port intake
ports
85cc CNCd D-shaped exhaust ports
62cc CNCd combustion chambers
Bare head P/N 12564825 available
separately
Heads 12564824, 88958665
and 88958622 are assembled
with the following
components:
12565311
Intake Valves
10166344
Valve Spring Retainers
12565312
Exhaust Valves
12482063
Intake Valve Stem Seals
12586484
Valve Springs
12482062
Exhaust Valve Stem Seals
10166345
Valve Locks
12576063
LS2 Cylinder Head Assembly (not shown)
Lower cost alternative
to the LS6 CNC head
Fits any 19972007 LS family engine*
2.00" Solid stem intake, and 1.55"
solid stem exhaust valves
.570" max valve lift
210cc Cathedral port intake ports
70cc D-shaped exhaust ports
65cc combustion chambers
Bare head P/N 12564825 available
separately
 B.
88958765
CNC-Ported LS2 Cylinder
Head Assembly
CNC-ported aluminum
performance head
Lower cost alternative to the CNC LS6
head
Fits any 19972007 LS family engine*
2.00" Solid stem intake, and 1.55"
solid stem exhaust valves
.570" max valve lift
250cc CNCd Cathedral port intake
ports
85cc CNCd D-shaped exhaust ports
65cc CNCd combustion chambers
Bare head P/N 12564825 available
separately CNC
Ported LS2 Cyl Head
Heads 12576063 and
88958765 are assembled with the
following components:
12563063
Intake Valves
10166344
Valve Spring Retainers
12563064
Exhaust Valves
12482063
Intake Valve Stem Seals
12586484
Valve Springs
12482062
Exhaust Valve Stem Seals
10166345
Valve Locks
LS2 & LS6 Head Flow Data:
Lift
0.2 0.3 0.4 0.5 0.6
Stock intake
136 195 237 260 260
Stock exhaust
104 135 157 169 180
CNC intake
147 215 262 290 307
CNC exhaust
111 155 198 210 218
 C.
12582713
NEW
L76/L92 Cylinder Head
Assembly
Aluminum performance
head
Higher flow than cathedral port LS
heads
Fits any LS family engine with 4.00"
bore or larger
2.16" solid stem intake, and 1.59"
solid stem exhaust valves
.510" max valve lift with stock
springs
As-cast rectangle port intake ports
(not compatible with LS7 intakes)
D-shaped exhaust ports
As-cast combustion chambers
Uses bare head P/N 12582714 L76/L92
Cyl. Head
Head 12582713 is
assembled with the following components:
12590771
Intake Valves
10166344
Valve Spring Retainers
12582719
Exhaust Valves
12482063
Intake Valve Stem Seals
12589774
Valve Springs
12482062
Exhaust Valve Stem Seals
10166345
Valve Locks
L76/L92 Head Flow Data:
Lift
0.2 0.3 0.4 0.5 0.6
Intake
154 225 275 309 330
Exhaust
121 154 180 194 202
The LS Family Aluminum
Heads Continued
 A.
12480090
Bare C5R Racing Cylinder Head
355-T7 as-cast
Aluminum racing head
Professional porting
and machining of combustion chambers
required
No seats or guides
C5R Rectangle port designrequires
rectangle port intake manifolds
Designed for 2.180"/1.625" valves
Valve angle revised to 11
Machined for 1.625" diameter valve
springs & .500" guides
Designed for big bore LS7/C5R/LSX
block
210cc as-cast intake ports
70cc as-cast exhaust ports, same as
production LS6
30cc as-cast combustion chambers
All fasteners are metric
Valve cover rails have O-ring groove
for .125" O-ring
Capable of over 800 horsepower! Bare
C5R Racing Head
12578449
LS7 Cylinder Head Assembly (not shown)
356-T6 aluminum head
Fully CNCd ports and
chambers
C5R/LS7 rectangle port designrequires
rectangle port intake manifold P/N
25534394 or 12568976
Assembled with 2.20 titanium intake
and 1.61 sodium filled exhaust valves
12 valve angle
Designed for big bore LS7/C5R/LSX
block (min 4.065" bore)
270cc CNCd intake ports
85cc CNCd exhaust ports
70cc CNCd combustion chambers
All fasteners are metric
Capable of over 600 horsepower
Bare head P/N 12575450 available
separately
This head is assembled
with the following components:
12591644
Intake Valves
12596508
Valve Spring Retainers
12578455
Exhaust Valves
12482063
Intake Valve Stem Seals
12578457
Valve Springs
12482062
Exhaust Valve Stem Seals
10166345
Valve Locks
12596509
Intake Valve Lash Cap
LS7 Head Flow Data:
Lift
0.1 0.2 0.3 0.4 0.5 0.55
0.6 0.7
Intake
71.0 145.0 222.0 271.0
315.0 332.0 348.0 352.0
Exhaust
60.0 120.0 159.0 192.0
207.0 214.0 219.0 221.0
25534428
NEW
LS7 Bare Unported
Cylinder Head (not shown)
356-T6 aluminum head
C5R/LS7 rectangle port
designrequires rectangle port intake
manifold P/N 25534394 or 12568976
Machined for 2.20"/1.61" valves
Designed for big bore LS7/C5R/LSX
block (min 4.065" bore)
Limited availability
17801930
LS6 Hollow Stem Valve Kit (not shown)
Kit of (4) intake and
(4) exhaust valves originally for LS6
engines to drop right
into your LS2 head
One kit services one head
19153789
NEW
Bare Block Completion
Kit, Gen III (not shown)
Includes all parts to
complete a Gen III bare block
The kit includes:
PART NUMBER QTY
DESCRIPTION
12575742
01 Valley Cover
12561211
01 Cam Sensor
11515756
08 Bolt
12570471
01 Valley Cover
12561243
01 Front Cover
11515758
08 Bolt
12572014
01 Rear Crankshaft Seal
Housing
12556127
12 Bolt
12602972
01 Rear Crankshaft Oil
Seal
12574293
01 Rear Crankshaft Seal
Housing Gasket
12573460
01 Oil Galley Plug
11588949
02 Oil Plug
09427693
04 Water Drain Plug
01453658
02 Transmission Alignment
Dowel
12561663
01 Water Drain Plug
12556437
01 Camshaft Retainer
Plate |
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GM TIMING CHAINS AND SPROCKETS
12576407
Camshaft Sprocket
Fits LS1, LS2 and LS6
12556582
Crankshaft Sprocket
Fits LS1, LS2 and LS6
12586482
Chain Assembly
Fits LS1, LS2 and LS6
NOTE:
88958607
LS1, LS6 Timing Chain Dampener
Improves timing chain life in high-rpm applications
Will not fit LS2 and LS7 block
Use only in applications as a replacement. (For new installments, use P/N 12588670.)
Some block require drilling and tapping; instructions included.
12588670
LS2 Timing Chain Dampener
Production LS2 Dampener will not fit LS1 and LS6 block fitted with P/N 88958607
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19155067 NEW
Serpentine Accessory Drive System, with Air Conditioning
Fits LS2 and LS7
Deluxe kit included all the components and hardware necessary to install on an engine with air conditioning, including water pump, alternator, power steering pump and idler bracket. (Belt included).
The system includes:
12579229 Belt (water pump, alternator, and power steering)
12585476 Belt (A/C compressor, LS7)
12569301 Tensioner Assembly
12595289 A/C Belt Tensioner Assembly
12568996 Idler Pulley
88958093 A/C Compressor
12569286 A/C Compressor Bracket
15261472 Power Steering Pump (reman)
26046502 Power Steering Reservoir
12578067 Alternator and Power Steering Pump Bracket
12555693 Power Steering Pump Brace
12568997 Power Steering Pump Pulley
15841234 Alternator
12579228 Belt (A/C compressor, LS2) |
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GM CYLINDER
HEAD GASKETS
& HEAD BOLTS
12498543
Cylinder
Head Gasket
Kit (not
shown)
Two head
gaskets for
19972001
LS1 Camaro/Firebird
and Corvette
engines
Also fits
2001 LS6
Corvette
engine
12498544
Cylinder
Head Gasket
Kit (not
shown)
Two head
gaskets for
20022004
LS1Camaro/Firebird
and Corvette
engines
12498545
Cylinder
Head Bolt
Kit
(19972003)
(not shown)
Kit of 15
head bolts
for
19982003
LS1 Camaro/Firebird
and
19972003
Corvette;
and
20012003
LS6 Corvette
One kit
per cylinder
head. Order
two per
engine.
Head bolts
cannot be
reused on
these
engines
IMPORTANT!!
LS Series
engines
produced
from January
2004 forward
on have a
new,
short-style
head bolt
design.
Earlier head
bolts WILL
NOT fit.
Order
17800568 for
engines
produced
from January
2004 and
after.
17800568
Cylinder
Head Bolt
Kit (not
shown)
Kit of 15
bolts for LS
Series
engines
produced
from January
2004 and
later
Bolts are
5mm shorter
than
previous
design
12499217
LS1 Cylinder
Head
Installation
Kit (F-Car)
Comprehensive
cylinder
head
installation
kit for 2002
Camaro and
Firebird
models
equipped
with the LS1
engine
Kit
includes two
head
gaskets, two
valve cover
gaskets,
eight intake
manifold
gaskets, two
exhaust
manifold
gaskets, two
intake
manifold-to-block
seals, 16
cylinder
head bolts
and 14
cylinder
head
bolt/screws
12499218
Corvette
LS1/LS6
Cylinder
Head
Installation
Kit (not
shown)
Comprehensive
cylinder
head
installation
kit for
20022005
Corvette
models
equipped
with the
LS1engine,
or 20022004
Corvette
models
equipped
with the LS6
engine
Kit
includes two
head
gaskets, two
valve cover
gaskets,
eight intake
manifold
gaskets, two
exhaust
manifold
gaskets, two
intake
manifold-to-block
seals, 16
cylinder
head bolts
and 14
cylinder
head
bolt/screws |
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GM VALVE COVERS
12480025
Valve Cover, Corvette
Aluminum valve cover
designed for racing cylinder head P/N
12480005 and 12480090
Fits production center-bolt LS Series
cylinder heads
Sold as single piece. Order two per
engine.
25534398
LS Center-Bolt
Competition Valve Cover (with Breather
Hole)
Aluminum valve cover
designed for production center-bolt LS
Series cylinder heads
Sold as single piece. Order two per
engine.
25534399
LS Center-Bolt
Competition Valve Cover
Aluminum valve cover
designed for production center-bolt LS
Series cylinder heads
Sold as single piece. Order two per
engine. |
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GM OIL PANS & ACCESSORIES
Listing of many LS Oil Pan Options:
12561828
Corvette Oil Pan
(20022004 LS6)
Used on 20022004
Corvettes with LS6 V-8
12558762
F-Car Oil Pan
Used on 19982003
Camaro and Firebird LS1 V-8
 23011420
Magnetic Drain Plug
Catches and holds small
pieces of metal before they can cause
damage
17801830
High Volume LS Oil Pump
Kit (not shown)
High Volume pump
assembly for LS Series engines (except
LS7 applications)
Pump pick up seal included
GM OIL FILTERS AND
ADAPTERS
25534412
NEW
LS7 Oil Hose Adapters
Kit adapts the
production LS7 Oil Pan to aftermarket AN
style hoses for aftermarket dry sump oil
tanks
Bolts directly to LS7 Oil Pan, and has
AN male outlet for -12 AN fittings
Includes (2) fittings, (2) bolts, and
(2) sealing gaskets
GM EXHAUST
MANIFOLD/HEADER
 12480130
Header Flange
These 3/8" thick steel
header flanges are a great way to start
a fabricated set of LS series Headers
for a racecar or street rod
For stock LS1, LS2, LS6 and LS7
exhaust ports |
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GM INTAKE MANIFOLDS
88894339
LS6 Intake Manifold
Gen III fuel injected
nylon manifold used on the 20012004 LS6
Corvette engine
Supplied with the intake manifold seal
P/N 12560251, gasket
P/N 12533587, throttle body seal P/N
12552542, MAP sensor
P/N 16212460, and MAP sensor seal P/N
16194007
 88958675
LS2 4-Barrel Intake
Manifold
Allows you to install a
four-barrel carburetor on a LS Series
engine with cathedral ports (LS1, LS6,
LS2)
Cast aluminum open-plenum intake
manifold accepts a 4150-style
square-bore carburetor
Bosses for EFI injectors for custom
applications
Bolts and instructions supplied An
ignition driver is required.
25534394
NEW
LS7 4-Barrel Intake
Manifold (not shown)
GM Racing design for
use on LS7 heads
As-cast design requires no porting for
maximum performance
Includes mounting bolts and
instructions
Requires aftermarket gasket
Machined for 4150-style carburetors
and has 3/8" NPT vacuum boss An ignition
driver is required.
25534401
NEW
L76/L92 4-Barrel Intake
Manifold (not shown)
GM Racing design for
use on as-cast rectangle port Gen IV
cylinder heads
As-cast design requires no porting for
maximum performance
Includes mounting bolts and
instructions
Requires aftermarket gasket
Machined for 4150-style carburetors
and has 3/8" NPT vacuum boss An ignition
driver is required.
88965830
Carburetor Spacer, Single
Plane, One-Inch
Fully CNCd from billet
aluminum
GM Performance Parts logo machined
into front and back
88965831
Carburetor Spacer, Single
Plane,Two-Inch
Fully CNCd from billet
aluminum
GM Performance Parts logo machined
into front and back
 88958679
LS Front Distributor
Drive Cover
Assembly is
manufactured for applications where a
4-barrel carburetor and distributor are
required
Can be combined with GMs new Bowtie
valve covers
P/N 25534398 and P/N 25534399 for a
complete traditional looking engine
package
Distributor and mechanical fuel pump not
included. Uses small-block Ford style
distributor and mechanical fuel pump.
12568976
NEW
LS7 Production Intake
Manifold Assembly (not shown)
Gen IV fuel injection
nylon manifold used on the 20062007
Corvette Z06 LS7 engine
Fully assembled with injectors, fuel
rail, 90mm ETC throttle body and gaskets
For use only with LS7 cylinder heads
P/N 12578449 and 25534428
12590123
NEW
L76 Production Car Intake
Manifold Assembly (not shown)
Gen IV fuel injection
nylon manifold used on the 2007
Australian Holden L76 car engine
Fully assembled with injectors, fuel
rail, 90mm ETC throttle body and gaskets
For use only with L92/L76 cylinder
heads P/N 12582713 |
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GM VALVE LIFTERS
12499225
LS Series
Camshaft Lifter Kit (not shown)
Set of 16
lifters for LS Series engines
Same lifter used in LS2 and
LS7
17803305
Lifter Guide Kit
(not shown)
Includes lifter
guides and 4 bolts
Makes for quick and easy cam
swaps without having to remove
the intake manifold, valley
plate or heads
Works in Gen III and IV
applications (except with AFM)
88958689
NEW
Racing Hydraulic
Roller Lifter Kit
As developed by
GM Racing and GM Powertrain
For use in Gen III and Gen IV
engines where sustained high
rpms are typical
Special reduced-mass internal
components allow for higher
limiting speeds with aggressive
camshaft designs
Improved valvetrain dynamics
and stability will improve
horsepower, and high rpms
Tested to 8000 rpm in GM
Racing applications
Set of 16 |
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GM LS SERIES CAMSHAFTS
Part Description Duration
Maximum Lobe Technical Notes Number @
.050" Lift (in) Centerline Lift (deg)
(deg)
12565308
20022004 LS6 I: 204 I:
.550 117.5 Cam requires valve spring P/N
12586484 E: 218 E: .550
12560950
2001 LS6/ Vortec I: 207
I: .525 116 Cam requires valve spring
P/N 12586484 engines E: 217 E: .525
12480110
LS1 I: 226 I: .525 110
Cam requires valve spring P/N
12586484;
ASA cam for off-highway use E: 236 E:
.525
12480033
Hot cam kit I: 219 I:
.525 112 Kit includes 16 LS6 valve
springs P/N 12565117 LS6 E: 228 E: .525
88958606
Roller cam I: 239 I: .570
106.5 Showroom Stock racing design;
requires hollow stem intake valves P/N
12565311,
LS1 or LS6 E: 251 E: .570 hollow stem
exhaust valves P/N 12565312, valve
springs P/N
12586484, and aftermarket
notched pistons OR machine stock pistons
12561721
LQ9: 20022006 I: 196 I:
467 116 Stock cam for 20022006 LQ9 and
2001-2004 LS1 engines LS1: 2001-2004 E:
201 E: 47
88958733 Hot cam only 219/228
.525 lift
88958722 Stage 2 227/239 .551
lift
88958723 Stage 3 233/276 .595
lift
GM CAMSHAFTS
12499228
Cam Installation Kit, LS
Engine (not shown)
Complete gasket kit to
make cam swaps easier
Includes all necessary gaskets and
balancer bolt
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