LS1

Displacement: 346ci
Block: Cast Aluminum
Heads: Aluminum with 15 degree cathedral port
Compression: 10:1
Bore & Stroke: 3.900” x 3.622”
Output: rated at 305–350 hp, 335-375 lb-ft.
Applications: 1998-2002 GM F-Body Camaro Z28 and SS, Pontiac Formula and Trans Am, 1997-2004 C5 Corvette, 2004 Pontiac GTO.

LS2

Displacement: 364ci
Block: Cast Aluminum
Heads: Aluminum with 15 degree cathedral port
Compression: 10.9:1
Bore & Stroke: 4.000” x 3.622”
Output: rated at 400 hp and 400 lb·ft
Applications: 2005-2006 Pontiac GTO,  2005-2006 Chevrolet SSR, 2005-2007 Corvette, 2006-2007 Cadillac CTS-V, 2006-2009 Chevrolet TrailBlazer SS

LS3

Displacement: 376ci
Block: Cast Aluminum
Heads: Aluminum with 15 degree cathedral port
Compression: 10.7:1
Bore & Stroke: 4.065” x 3.622”
Output: rated at 430 hp and 424 lb-ft
Applications: 2008-2012 Corvette, 2009 Pontiac G8 GXP, 2010 and up Chevrolet Camaro SS.

LS4

Displacement: 325ci
Block: Cast Aluminum
Heads: Aluminum with 15 degree cathedral port
Output: rated at 303 hp and 323 lb·ft
Applications: 2006-2009 Chevrolet Impala SS, 2006-2007 Chevrolet Monte Carlo SS, 2005-2008 Pontiac Grand Prix GXP and the 2008 Buick LaCrosse Super.

LS6

Displacement: 346ci
Block: Cast Aluminum
Heads: Aluminum with 15 degree cathedral port
Compression: 10.5:1
Bore & Stroke:  3.900” x 3.622”
Output: 385-405  hp and 385-400 lb·ft
Applications: 2001-2004 Chevrolet Corvette C5 Z06 and 2004-2005 Cadillac CTS-V.

LS7

Displacement: 427ci
Block: Cast Aluminum
Heads: Aluminum with 12 degree rectangle port
Compression: 11:1
Bore & Stroke: 4.125” x 4.000”
Output: Rated at 505 hp and 470 lb·ft
Applications: 2006-2012 Chevrolet Corvette Z06

LS9

Displacement: 376 ci
Block: Cast Aluminum
Heads: Aluminum with 15 degree rectangle port
Compression: 9.1:1
Bore & Stroke: 4.065” x 3.622”
Output: Rated at 638 hp and 604 lb-ft
Applications: 2009 and newer Corvette ZR1

LQ4

Displacement: 366ci
Block: Cast Iron
Heads: Cast Aluminum or Cast Iron 15-degree cathedral port
Compression: 9.4:1
Bore & Stroke: 4.000” x 3.622”
Output: Rated at 300-325 hp and 360-370 lb·ft
Applications: 1999-2004: Chevrolet Express/GMC Savana, Chevrolet Silverado 2500, Chevrolet Suburban/GMC Yukon XL Denali, Hummer H2

LQ9

Displacement: 364ci
Block: Cast Iron
Heads: Cast Aluminum 15-degree cathedral port
Compression: 10:1
Bore & Stroke: 4.000” x 3.622”
Output: Rated at 345 hp and 380 ft·lb
Applications: 2002-2006 Cadillac Escalade, Cadillac Escalade EXT, 2003-2006 Cadillac Escalade ESV, 2003-2007 Chevrolet Silverado SS, 2004-2005 Chevrolet Silverado and GMC Sierra (Vortec HO Edition only), 2006-2007 Classic Chevrolet Silverado and GMC Sierra VortecMax Option.

LY6

Displacement: 364ci
Block: Cast Iron
Heads: Cast Aluminum 15-degree rectangle port
Compression: 9.67:1
Bore & Stroke: 4.000” x 3.622”
Output: Rated at 352 hp and 382 ft-lbs.
Applications: 2007 to present: Chevrolet Silverado HD, GMC Sierra HD, Chevrolet Suburban 3/4 ton, GMC Yukon XL 3/4 ton.

L76

Displacement: 364ci
Block: Cast Aluminum
Heads: Cast Aluminum 15-degree rectangle port
Compression: 10.4:1
Bore & Stroke: 4.000” x 3.622”
Output: Rated at 361-366 hp and 376-385 ft-lbs
Applications: 2007-2009: Chevrolet Surburban, Chevrolet Avalanche, Chevrolet Silverado, GMC Sierra, GMC Yukon XL and 2008-2009 Pontiac G8 GT.

LSA

Displacement: 376ci
Block: Cast Aluminum
Heads:  Aluminum 15-degree rectangle port
Compression: 9.1:1
Bore & Stroke: 4.065” x 3.622”
Output: Rated at 556 hp and 551 ft-lbs
Applications: 2009+ CTS-V, Corvette ZR1

 Vortec 4800 4.8

Displacement: 293ci
Block: Cast Iron or Aluminum
Heads:  Iron or Aluminum 15-degree cathedral port
Compression: 9.5:1
Bore & Stroke:  3.780” x 3.267”
Output: Rated at 270-295 hp and 285-305 ft-lbs
Applications: 99-06 Silverado, Tahoe, Yukon, and Sierra (LR4), 07+ Silverado, Tahoe, Yukon, and Sierra (LY2)

Vortec 5300 5.3

Displacement: 325ci
Block: Cast Iron or Aluminum
Heads:  Iron or Aluminum 15-degree cathedral port
Compression: 9.5-10:1
Bore & Stroke:  3.780” x 3.622”
Output: Rated at 285-320 hp and 325-340 ft-lbs
Applications: 99+ Mid/Fullsize Trucks amd SUV’s