Vehicle Applications

• 2005–2007 Chevrolet Corvette
• 2005–2006 Pontiac GTO
• 2006–2007 Cadillac CTS-V

Product Highlights

• Gen IV Aluminum Cylinder Block
• Cathedral Port Aluminum Cylinder Heads
• Advanced Electronic Throttle Control
• 24X E40 ECM (2005-2006) & 58X E38 / E67 ECM (2006-2009) Ignition Systems

LS2 Car Engine Specs (VIN "U")

The information listed here is for a stock engine.

Performance Specifications
Compression Ratio	10.9 : 1
Horsepower Rating	390-395 hp.
Torque Rating	400 ft./lbs.

 

Application Information
VIN 8th Digit	Year	Make	Model
U	2005-07	Chevrolet	Corvette
	2005-06	Pontiac	GTO
	2006-07	Cadillac	CTS-V

 

Engine Block Specifications
Casting Numbers	12568952, 12560799
Material	Aluminum
Displacement	6.0L / 364 c.i.d.
Bore Dia.	4.000 in.
Stroke	3.622 in.
Deck Height	9.240 in.
Bore Spacing	4.400 in.
Thrust Bearing Location	#3 Main
Main Cap Style	6-Bolt
Main Housing Bore Dia.	2.751 in.
Cam Housing Bore Dia.	Bore 1/5 = 2.346 in. Bore 2/4 = 2.326 in. Bore 3 = 2.307 in.
Cam-to-Crank Centerline	4.914 in.

 

Rotating Assembly Specifications
Piston Material	Hypereutectic Cast Aluminum Alloy
Piston Style	Flat Top
Piston Volume	0cc
Wrist Pin Dia.	0.9431 in. (Full Floating)
Connecting Rod Material	Powdered Metal
Connecting Rod Style	I-beam
Connecting Rod Length	6.098 in.
Connecting Rod Housing Bore	2.225 in.
Connecting Rod Bolts	M9 x 1 x 43
Connecting Rod P/N	12649190
Connecting Rod Casting Number (last three digits)	143
Crankshaft Material	Cast Iron
Crankshaft P/N	12569768
Crankshaft Casting Number (last three digits)	216
Crankshaft Main Journal Dia.	2.559 in.
Crankshaft Rod Journal Dia.	2.100 in.
Reluctor Wheel	24X on the 2005 Corvette and 2005-06 GTO
	58X on the 2006-07 Corvette and CTS-V

 

Cylinder Head Specifications
Casting Numbers	799, 243
Material	Aluminum
Combustion Chamber Volume	65cc
Intake Port Shape	Cathedral
Intake Runner Volume	210cc
Exhaust Port Shape	D-Port
Exhaust Runner Volume	75cc
Intake Valve Dia.	2.000 in.
Exhaust Valve Dia.	1.575 in.
Cylinder Head Bolt Style	Torque to Yield (TTY)
Cylinder Head Bolt Size	(10) M11 x 2 x 100, (5) M8 x 1.25 x 45

 

Camshaft Specifications
Applications	2005 Corvette, 2005-06 GTO	2006 Corvette / CTS-V	2007 Corvette / CTS-V
Camshaft P/N	12574519	12574519	12593206
Duration @ .050 in. (int./exh.)	204°/213°	204°/213°	204°/211°
Valve Lift (int./exh.)	0.520 in./0.521 in.	0.520 in./0.521 in.	0.524 in./0.524 in.
Lobe Separation	116°	116°	117°
Cam Gear Attachment	3-Bolt	3-Bolt	1-Bolt
Cam Gear P/N	12576407	12586481	12591689
Cam Gear Poles	1X	4X	4X
Active Fuel Management (AFM)	No
Variable Valve Timing (VVT)	No

 

Valvetrain Specifications
Lifter Style	Hydraulic Roller
Lifter Link Style	Plastic Lifter Tray
Lifter Body Dia.	0.842 in.
Pushrod Length	7.385 in.
Rocker Arm Mounting Style	Pedestal
Rocker Arm Style	Die-Cast, Roller Fulcrum
Rocker Ratio	1.7
Rocker Offset	None
Valve Spring Style	Beehive
Valve Spring Color	Natural
Valve Angle	15 degrees
Intake Valve Material	Steel, Solid Stem
Intake Valve Dia.	2.000 in.
Exhaust Valve Material	Steel, Solid Stem
Exhaust Valve Dia.	1.575 in.
Timing Chain P/N	12586482
Timing Chain Guide Style	Plastic Guide (2005-06), Spring Loaded Tensioner (2007)

 

Other Specifications
Intake Manifold	Car-Style
Throttle Body	90mm, 4-bolt, silver blade
Throttle Control	Electronic (Drive-by-Wire)
Fuel Injector P/N	12569113
Fuel Injector Flow	34 lb/hr @ 58 psi
Flex Fuel Capable (E-85)	No
Fuel Injector Length (between O-rings)	2.050 in.
Fuel Injector Connector	EV6 / USCAR
Computer	(E40) 2005 Corvette (E40) 2005-2006 GTO
	(E38) 2006-2007 Corvette
	(E67) 2006-2007 CTS-V
Crankshaft Reluctor Ring	(24X) 2005 Corvette (24X) 2005-2006 GTO
	(58X) 2006-2007 Corvette (58X) 2006-2007 CTS-V
Camshaft Sensor Location	Timing Cover
Oil Pan	Varies by Model
Oil Pump	Standard Volume (0.96 c.i./rev.)