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                                                   Charts

         LS Gen III/IV Engines                                             LS Camshafts                       LS Timing Components

         Compatibility Heads vs. Intake                            LS Pistons                             LS Crankshafts

         Compatibility Heads vs. Block                             LS Rings                                LS Connecting Rods

         LS Block Quick Reference Guide                        LS Push Rods                      Engine Torque Specs

         LS Cylinder Heads                                                  LS Valves

         LS  Head Gaskets/Bolts                                         LS Valve Springs

 

 

Gen III & Gen IV Small Blocks
Part Number Description Liters CID HP TQ Bore Stroke
19165628 LS327/327 5.3 327 327 347 3.780" 3.622"
17801267 LS1 5.7 346 350 365 3.898" 3.622"
17801268 LS6 5.7 346 405 395 3.898" 3.622"
19156262 LQ9 6.0 364 345 380 4.000" 3.622"
*19165484 LS2 6.0 364 400 400 4.000" 3.622"
*17802134 LS364/440 6.0 364 440 404 4.000" 3.622"
12611022 L99 6.2 376 430 424 4.065 3.622"
19171224 LS376/485 6.2 376 485 475 4.065" 3.622"
19171225 LS376/515 6.2 376 515 469 4.065" 3.622"
19201992 LS3 6.2 376 430 424 4.065" 3.622"
19211978 LSA 6.2 376 556 551 4.065" 3.622"
19201990 LS9 6.2 376 638 604 4.065" 3.622"
19171821 CT525 6.2 376 525 471 4.065" 3.622"
19165058 LS7 7.0 427 505 470 4.125" 4.000"
  * Discontinued            

 

LS Compatibility - Heads vs. Intakes
Intakes Heads
Engine Part # Manifold Port Type 12559855 LS1 12564824 LS6/LS2 12562319 LQ9 88958665 CNC LS6 88958622 CNC LS6 12582713 L76/L92 12615879 LS3 88958698 CNC L92
LS1/LS6 88894339 EFI Cathedral Yes Yes Yes Yes Yes No No No
LS2/LQ4 88958675 4-bbl Cathedral Yes Yes Yes Yes Yes No No No
LQ4/LQ9 N/A EFI Cathedral Yes Yes Yes Yes Yes No No No
L76 12590123 EFI L92 No No No No No Yes Yes Yes
LS3 12610434 EFI L92 No No No No No Yes Yes Yes
L76/L92/LS3 25534416 4-bbl w/inj L92 No No No No No Yes Yes Yes
L76/L92/LS3 25534401 4-bbl L92 No No No No No Yes Yes Yes
L92/LS3 19166952 LSX 4bbl L92 No No No No No Yes Yes Yes
L92/LS3 19172322 LSX 4bbl L92 No No No No No Yes Yes Yes
LS7 '05-'08 12568976 EFI LS7 No No No No No No No No
LS7 '09 12610435 EFI LS7 No No No No No No No No
LS7 25534413 4-bbl w/inj LS7 No No No No No No No No
LS7 25534394 4-bbl LS7 No No No No No No No No
LSX 454 19166948 LSX 4bbl LS7 No No No No No No No No
  19166950 LSX 4bbl LSX-CT No No No No No No No No
  19166954 LSX 4bbl LSX-DR No No No No No No No No
      No=not compatable Yes=direct compatability      
Intakes Heads
Engine Part # Manifold Port Type 19201807 LSX-L92 19201805 LSX-LS3 19213963 LSX-LS9 12578450 CNC LS7 19201806 LSX-LS7 19166981 LSX-CT 19166979 LSX-DR 12480090 C5R
LS1/LS6 88894339 EFI Cathedral No No No No No No No No
LS2/LQ4 88958675 4-bbl Cathedral No No No No No No No No
LQ4/LQ9 N/A EFI Cathedral Yes Yes Yes No No No No No
L76 12590123 EFI L92 Yes Yes Yes No No No No No
LS3 12610434 EFI L92 Yes Yes Yes No No No No No
L76/L92/LS3 25534416 4-bbl w/inj L92 Yes Yes Yes No No No No No
L76/L92/LS3 25534401 4-bbl L92 Yes Yes Yes No No No No No
L92/LS3 19166952 LSX 4bbl L92 Yes Yes Yes No No No No No
L92/LS3 19172322 LSX 4bbl L92 Yes Yes Yes No No No No No
LS7 '05-'08 12568976 EFI LS7 No No No Yes Yes No No No
LS7 '09 12610435 EFI LS7 No No No Yes Yes No No No
LS7 25534413 4-bbl w/inj LS7 No No No Yes Yes No No No
LS7 25534394 4-bbl LS7 No No No Yes Yes No No No
LSX 454 19166948 LSX 4bbl LS7 No No No Yes Yes No No No
  19166950 LSX 4bbl LSX-CT No No No No No Yes Yes No
  19166954 LSX 4bbl LSX-DR No No No No No Yes Yes No
      No=not compatable Yes=direct compatability      

 

 
LS Compatability - Heads vs. Blocks
Blocks Heads
Engine Part # Bore Size 12559855 LS1 12564824 LS6/LS2 12562319 LQ9 88958665 CNC LS6 88958622 CNC LS6 12582713 L76/L92 12598594 LS3 88958698 CNC L92
LS1/LS6 12561166 3.89" Yes Yes Yes Yes Yes No No No
LQ4/LQ9 12572808 4.00" Yes Yes Yes Yes Yes Yes Yes Yes
LS2/L76 12568950 4.00" Yes Yes Yes Yes Yes Yes Yes Yes
L92/LS3 12584727 4.06" Yes Yes Yes Yes Yes Yes Yes Yes
LSA/LS9   4.06" Yes Yes Yes Yes Yes Yes Yes Yes
LS7 17802854 4.125" Yes Yes Yes Yes Yes Yes Yes Yes
LS7* 25534427 4.125" Yes Yes Yes Yes Yes Yes Yes Yes
C5R 12480030 4.12"-4.16" Yes Yes Yes Yes Yes Yes Yes Yes
LSX S/B 19213964 3.89" Yes Yes Yes Yes Yes * * *
LSX 19166454 3.99"-4.25" * * * * * * * *
LSX TD 19166097 3.99"-4.25" * * * * * * * *
No=not compatable Yes=direct compatability *=4.00 min Bore **=4.125" min Bore ***=4.100" min Bore
Blocks Heads
Engine Part # Bore Size 19201807 LSX-L92 19201805 LSX-LS3 19213963 LSX-LS9 12578450 CNC LS7 19201806 LSX-LS7 19166981 LSX-CT 19166979 LSX-DR 12480090 C5R
LS1/LS6 12561166 3.89" Yes No No No No No No No
LQ4/LQ9 12572808 4.00" Yes Yes Yes No No No No No
LS2/L76 12568950 4.00" Yes Yes Yes No No No No No
L92/LS3 12584727 4.06" Yes Yes Yes No No No No No
LSA/LS9   4.06" Yes Yes Yes No No No No No
LS7 17802854 4.125" Yes Yes Yes Yes Yes Yes Yes Yes
LS7* 25534427 4.125" Yes Yes Yes Yes Yes Yes Yes Yes
C5R 12480030 4.12"-4.16" Yes Yes Yes Yes Yes Yes Yes Yes
LSX S/B 19213964 3.89" ** ** ** ** *** ** ** **
LSX 19166454 3.99"-4.25" ** ** ** ** *** ** ** **
LSX TD 19166097 3.99"-4.25" ** ** ** ** *** ** ** **
No=not compatable Yes=direct compatability *=4.00 min Bore **=4.125" min Bore ***=4.100" min Bore

 

LS Series Blocks
Origin Part # Material Deck Height Bore Main Bolt Cap Material Crank Jrnl Dia Oiling Rr Main Seal Max Stroke Max HP Usage
LS1/LS6 12561166 Alum 9.240 3.89" 6 Iron Std LS 2.56 Wet 1 Pc 4.00" 450 Street
LS2 12568950 Alum 9.240 4.00" 6 Iron Std LS 2.56 Wet 1 Pc 4.00" 450 Street
L92/LS3 12584727 Alum 9.240 4.065" 6 Iron Std LS 2.56 Wet 1 Pc 4.00" 525 Street
LS7 17802854 Alum 9.240 4.125" 6 PM Std LS 2.56 Dry 1 Pc 4.10" 550 Street
LS7 25534427 Alum 9.240 4.125" 6 PM Std LS 2.56 Dry 1 Pc 4.10" 550 Street
C5R 12480030 Alum 9.240 4.117"-4.160" 6 8620 Steel Std LS 2.56 Wet 1 Pc 4.10" 900 Pro
LQ9 12572808 Iron 9.240 4.00" 6 Iron Std LS 2.56 Wet 1 Pc 4.00" 500 Street
LSX 19166454 Iron 9.260 3.99"-4.250" 6 1045 Steel Std LS 2.56 Wet 1 Pc 4.25" 1500+ Street/Pro
LSX 19166097 Iron 9.700 3.99"-4.250" 6 1045 Steel Std LS 2.56 Wet 1 Pc 4.50" 1500+ Street/Pro

 

LS Series Heads
Part # Origin Material Port Size Valve Angle Chamber CC's Int Valves Exh Valves Port Type Rocker Stud Notes
12564825 Bare LS2 & LS6 Alum 210 15 degree 64.5 2.00 1.55 Cathedral Bolt Bare LS2/LS6
12564824 Stock LS6 Alum 210 15 degree 64.5 2.00 1.55 Cathedral Bolt Hollow/Sodium filled Valves
12576063 Stock LS2 Alum 210 15 degree 64.5 2.00 1.55 Cathedral Bolt Solid stem valves
88958622 CNC LS6 Alum 250 15 degree 61.9 2.00 1.55 Cathedral Bolt 11.2 compression
88958665 CNC LS6 Alum 250 15 degree 65 2.00 1.55 Cathedral Bolt 10.5 compression
88958765 CNC LS2 Alum 250 15 degree 64.5 2.00 1.55 Cathedral Bolt Solid stem valves
12582714 Bare L76/L92 Alum 260 15 degree 70 2.16 1.59 L92 Bolt Solid stem valves
12582713 Stock L76/L92 Alum 260 15 degree 70 2.16 1.59 L92 Bolt Solid stem valves
88958698 CNC L76/L92 Alum 279 15 degree 68 2.16 1.59 L92 Bolt Solid stem valves
12598594 Stock LS3 Alum 260 15 degree 70 2.16 1.59 L92 Bolt Hollow/Sodium filled Valves
12578450 Bare LS7 Alum 270 12 degree 70 2.20 1.61 LS7 Bolt Bare LS7
12578449 Stock LS7 Alum 270 12 degree 70 2.20 1.61 LS7 Bolt Titanium/sodium filled valves
25534428 As-cast LS7 Alum - 12 degree 66 2.20 1.61 LS7 Bolt Titanium/sodium filled valves
12480005 * C5R 1st design Alum 210 11 degree 38 2.18 1.63 C5R Shaft As cast-no seats, guides *
12480090 C5R 2nd design Alum 210 11 degree 30 2.18 1.63 C5R Shaft As cast-no seats, guides
19201807 LSX-L92 Small Bore Alum 260 15 degree 70 2.00 1.55 L92 Bolt Hollow/Sodium filled Valves
19201805 LSX-LS3 Alum 260 15 degree 70 2.16 1.59 L92 Bolt Hollow/Sodium filled Valves
19201806` LSX-LS7 Alum 270 12 degree 70 2.20 1.61 LS7 Bolt Hollow/Sodium filled Valves
19166981 LSX-CT Alum 302 11 degree 45 2.20 1.61 LSX-CT/DR Shaft CNC machined bare head
19166979 LSX-DR Alum 313 11 degree 50 2.25-2.28 1.6-1.65 LSX-CT/DR Shaft CNC machined bare head
      *Discontinued            

 

 

LS Series Head Gaskets & Bolts
Part # Engine Thickness Max Bore Description
12498544 LS1 2002-2004 .047" 3.92 Standard LS Bolt Pattern
12589226 LS1 & LS6 .051" 3.92" Standard LS Bolt Pattern
12589227 LS2 .051" 4.02" Standard LS Bolt Pattern
12610046 LS3 & L92 .051" 4.080" Standard LS Bolt Pattern
12582179 LS7 .051" 4.140" Standard LS Bolt Pattern
19170418 LSX .051" 4.100" Standard LS & 6-Bolt Pattern Blocks & Heads
19170419 LSX .051" 4.200" Standard LS & 6-Bolt Pattern Blocks & Heads
19170420 LSX .051" 4.250" Standard LS & 6-Bolt Pattern Blocks & Heads
17800568 1/2004 & up LS Engines Includes 15 bolts 5mm shorter than 1st Design
12498545 97-1/04 LS Engines Includes 15 bolts  

 

LS Series Camshafts
Part # Description Duration @ .050" lift Max Lift (In) (1.7 rocker) Lobe Seperation Technical Notes
12565308 2002-2004 LS6 Cam I:204       E:218 I:550       E:550 117.5 Cam requires valve spring P/N 12586484
12560950 2001 LS6 Cam I:207       E:217 I:525       E:525 116 Cam requires valve spring P/N 12586484
12480110 ASA Cam I:226      E:236 I:525       E:525 110 Cam requires valve spring P/N 12586484        "ASA" cam for off-highway use
12480033 Hot Cam Kit I:219     E:228 I:525       E:525 112 Kit includes 16 LS6 Valve Springs P/N 12565117 and retainers
88958733 LS Hot Cam I:219     E:228 I:525       E:525 112 Cam only for Hot Cam Kit 12480033
19166972 LSX-454 Cam I:236      E:246 I:600       E:600 110 Max lift with 1.8 rockers .635/.635
88958606 Showroom Stock cam I:239     E:251 I:570     E:570 106.5 Showroom Stock racing design, requires hollow intake valves #12565311, hollow exhaust valves #12565312, valve springs #12586484, and aftermarket notched pistons or machined stock pistons
12571251 LS7 I:211    E:230 (1.8 Rocker)  I:591      E:591 121 Stock LS7 camshaft
12561721 LS1 2001-2004        LQ9 2002-2006 I:196    E:201 I:467       E:479 116 Stock cam for 2002-2006 LQ9 and 2001-2004 LS1
88958722 LS Stage 2 Cam I:227     E:239 (1.7 Rocker)   I:551     E:551 108 Max lift with 1.8 rockers .583/.583
88958723 LS Stage 3 Cam I:233    E:276 (1.7 Rocker)   I:595     E:595 107 Max lift with 1.8 rockers .630/.630

 

LS Series Pistons
Part # Engine Size Bore Size Oversize Rod Length Pin Type Comp Ratio With Chamber Description
88984245 5.7L 3.898" - 6.098" Pressed - 65.00 Hypereutectic LS1 & LS6 replacement
88984246 5.7L 3.898" +.010" 6.098" Pressed - 65.00 Hypereutectic LS1 & LS6 replacement
89017478 6.0L 4.000" - 6.098" Floated 10.90 65.00 Hypereutectic LS2 & LQ9 replacement
89017479 6.0L 4.000" +.020" 6.098" Floated 10.90 65.00 Hypereutectic LS2 & LQ9 replacement
12602624 7.0L 4.125' - 6.067" Floated 11.00 70.00 Hypereutectic LS7 replacement includes Titanium Rod
89018171 7.0L 4.125" +.020" 6.067" Floated 11.00 70.00 Hypereutectic LS7 replacement 
19166957 LSX376 4.065"   6.098"   Flat - 4032 Forged Aluminum -Piston comes w/ rings
19166958 LSX454 4.185"   LSX rod 0.866 Dished - 4032 Forged Aluminum -

 

LS Rings
Part # Bore Size Oversize Ring Thickness 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
89017484 4.000" - 1.5, 1.5, 2.5mm Production ring pack for 2005-2006 LS2 & 2006 L76
88894243 4.000" - 1.5, 1.5, 2.5mm Production ring pack for 2005-2006 LQ9
89017776 4.125" - 1.2, 1.2, 2.0mm Production ring pack for 2006 LS7
89017777 4.125" +.020" 1.2, 1.2, 2.0mm Oversize LS7 ring pack

 

LS Series Push Rods
Part # Engine Material Diameter Length Description
12593344 LS1, LS2, LS3, LS6 & L92 1010 Steel 5/16" 7.325" Production pushrod
12593344 LS7 1010 Steel 3/8" 7.750" Production pushrod

 

LS Series Valves
Part # Engine Position Valve Size Stem Dia  
12565311 LS6 Intake 2.00" 8mm Hollow Stem
12563063 LS2 Intake 2.00" 8mm Solid Stem
12590773 L76 & L92 Intake 2.165" 8mm Solid Stem
12605223 LSA Intake 2.165" 8mm Solid Stem
12569427 LS3 Intake 2.165" 8mm Hollow Stem
12605524 LS9 Intake 2.165" 8mm Titanium
12591644 LS7 Intake 2.20" 8mm Titanium
12565312 LS6 Exhaust 1.50" 8mm Sodium Filled
12563064 LS2 Exhaust 1.50" 8mm Solid Stem
12582719 L76, L92 & LS3 Exhaust 1.59" 8mm Solid Stem
12605525 LS9 Exhaust 1.59" 8mm Sodium Filled
12578455 LS7 Exhaust 1.61" 8mm Sodium Filled
17801930 LS2 & LS6 (4)Intake & (4)Exhaust I -2.00"           E-1.50" 8mm LS6 Hollow & Sodium Valves

 

LS Series Valve Springs
Part # Engine Style Installed Height Open Pressure Max Lift Description
12586484 Standard LS2, LS6 & LS6 Beehive Style 1.800" Installed @ 90# pressure 1.250" @ 295 # pressure .570" Individual
12499224 Standard LS2, LS6 & LS6 Beehive Style 1.800" Installed @ 90# pressure 1.250" @ 295 # pressure .570" Set of 16 P/N 12586484
12589774 Standard L76/L92 Springs Beehive Style 1.800" Installed @ 90# pressure 1.300" @ 264# pressure .530"  
12578457 LS7 Beehive Style 1.960" Installed @ 101# pressure 1.368" @ 310# pressure .600"  

 

LS Timing Components
Part # Engine Part Oil Pump System Description
12588670 LS2 Timing Chain Dampner Standard Will not Fil LS1 & LS6 fitted with P/N 88958607
12581276 LS7 Timing Chain Dampner LS7 2-stage 1.1mm thinner than 12588670
12576407 LS1, LS2 & LS6 1X Camshaft Gear - 3-bolt design; uses (3) bolts P/N 12556127
12586481 LS1, LS2 & LS6 4X Camshaft Gear - 3-bolt design; uses (3) bolts P/N 12556127
12585994 L92 - Combination Cam gear and VVT activator 4X Camshaft Gear - 1-bolt design; use P/N 12588151
12556582 All Non LS7 Crankshaft Gear Standard Works with 12576407 and 12586481 cam sprockets
12581278 LS7 Crankshaft Gear LS7 2-stage Works with 12576407 and 12586481 cam sprockets
12586482 All LS Timing Chain  - Fits all LS 1997-2008
12585997 L92 & LS3 Timing Chain Tensioner - Includes retainer and bolts
12556127 LS1,LS2,LS6 & LS7 Camshaft Gear bolts - For use with 3-bolt (non V.V.T.) cams
12588151 L92 Camshaft Gear bolts - Combination bolt and valve for variable valve timing - use with 12585994 Camshaft Gear

 

LS Crankshafts
Part # Application Material Reluctor Wheel Stroke Description
89017522 97-04 LS1/LS6 & 2005 LS2 Nodular Cast 24X 3.622" Balanced for 3.898" bore engines
12588612 2006 and up LS2 Nodular Cast 58X 3.622" Balanced for 4.00" bore engines
12568820 LS7 Forged Steel 58X 4.00" Rebalancing required if LS7 rods and pistons are not used.  2-stage Oil pump
19171619 LS Forged Steel 58X 4.00" Rebalancing required if LS7 rods and pistons are not used.  Standard wet sump Oil pump
12559353 1997-2005 - 24X - 1997-2005 Reluctor Wheel
12586768 2006 and up  - 58X - 2006 and newer Reluctor Wheel
89060436 All LS Rear Main Seal - - Rear Main Seal for all LS engines
LSX Crankshafts
Part # Note Material Reluctor Wheel Stroke Description
19170388 8-bolt flywheel or flexplate required 4340 premium steel 58X 3.622" Reguires Balancing
19170389 8-bolt flywheel or flexplate required 4340 premium steel 58X 3.750" Reguires Balancing
19170390 8-bolt flywheel or flexplate required 4340 premium steel 58X 4.00" Reguires Balancing
19170391 8-bolt flywheel or flexplate required 4340 premium steel 58X 4.125" Reguires Balancing

 

 
LS Connecting Rods
Part # Application Material Piston Fit Length Description
12568734 1997-2004 LS1 & LS6 PM Press 6.098" Sold Individually
12617570 2005-2008 LS2 & LS3 PM Float - Bronze Bushing 6.098" Sold Individually
12586258 LS7 Titanium Float - Bronze Bushing 6.067" Sold Individually
19166964 LSX              I-beam 4340 Forged Steel Float - Bronze Bushing 6.000" Set of 8, weight matched - NOT compatible with production pistons-for use with LSX Pistons INCLUDES 7/16" 12-point SAE 8740 rod bolts
19166965 LSX              I-beam 4340 Forged Steel Float - Bronze Bushing 6.100" Set of 8, weight matched - NOT compatible with production pistons-for use with LSX Pistons INCLUDES 7/16" 12-point SAE 8740 rod bolts
19166966 LSX              I-beam 4340 Forged Steel Float - Bronze Bushing 6.125" Set of 8, weight matched - NOT compatible with production pistons-for use with LSX Pistons INCLUDES 7/16" 12-point SAE 8740 rod bolts
19166967 LSX              I-beam 4340 Forged Steel Float - Bronze Bushing 6.150" Set of 8, weight matched - NOT compatible with production pistons-for use with LSX Pistons INCLUDES 7/16" 12-point SAE 8740 rod bolts
19166968 LSX              I-beam 4340 Forged Steel Float - Bronze Bushing 6.200" Set of 8, weight matched - NOT compatible with production pistons-for use with LSX Pistons INCLUDES 7/16" 12-point SAE 8740 rod bolts
11600158 Rod Bolt LS6 - - - Recommended in Gen III performance engines-Bolts have greater strength than pre-2000 rod bolts-  1 per package
11609825 Rod bolt LS7 - - - Required for LS7 builds-bolts are stretch to yield and can not be reused - 1 bolt per package
89017573 Rod Bearing All except LS7/LS9 - - - Connecting Rod Bearing - (1) per rod required
89017811 Rod Bearing LS7/LS9 - - - Connecting Rod Bearing - (1) per rod required

 

 

 

 

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