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LS Engine Technical Specifications

GEN III 1997-2005
LS1 5.7L Aluminum block and heads
345 HP at 5600 RPM 350 LB FT at 4400 RPM
3.898” bore 3.622” stroke 346 CID
10.25:1 compression ratio
Cathedral Port Cylinder Heads

LS6 5.7L Aluminum block and heads
2001 385 HP 385 LB FT TQ
2002-2004 405 HP 400 LB FT TQ
3.989” bore 3.622” stroke 346 CID
10.5:1 compression ratio
Cathedral Port Cylinder Heads

GEN IV 2005-2015
LS2 6.0L Aluminum block and heads
400 HP at 6000 RPM 400 LB FT TQ at 4400 RPM
4.00” bore 3.622” stroke 364 CID
10.9:1 compression ratio
Cathedral Port Cylinder Heads

LS3 6.2L Aluminum block and heads
430 HP at 5900 RPM 424 LB FT TQ at 4600 RPM
4.06” bore 3.622” stroke 376 CID
10.7:1 compression ratio
Rectangular Port Cylinder Heads

L99 6.2L Aluminum block and heads
400 HP at 5900 RPM 410 LB FT TQ at 4300
4.06” bore 3.622” stroke 376 CID
10.4:1 compression ratio
Rectangular Port Cylinder Heads

LS7 7.0L Aluminum block and heads
505 HP at 6300 RPM 470 LB FT TQ at 4800
4.125” bore 4.00” stroke 427 CID
11.0:1 compression ratio
Raised Rectangular Port Cylinder Heads

LS9 6.2L Aluminum block and heads
2.3L Supercharger
638 HP at 6500 RPM 604 LB FT TQ at 3800 RPM
4.06” bore 3.62” stroke 376 CID
9.1:1 compression ratio
Rectangular Port Cylinder Heads

LSA 6.2L Aluminum block and heads
1.9L Supercharger
Cadillac version
556 HP at 6100 RPM 551 LB FT TQ at 3800 RPM
Chevrolet version
580 HP at 6100 RPM 556 LB FT TQ at 3800 RPM
4.06” bore 3.62” stroke 376 CID
9.0:1 compression ratio
Rectangular Port Cylinder Heads