Vehicle Applications

• 2001–2004 Chevrolet Corvette Z06
• 2004–2005 Cadillac CTS-V

Product Highlights

• Gen III Aluminum Cylinder Block
• Cathedral Port Aluminum Cylinder Heads
• Drive By Wire (Electronic Throttle)
• 24X Ignition Systems

LS6 Engine Specs (VIN "S")

The information listed here is for a stock engine.

Performance Specifications
Compression Ratio	10.5:1
Horsepower Rating	385-405 hp
Torque Rating	385-400 ft./lbs

 

Application Information
VIN 8th Digit	Year	Make	Model
S	2001-2004	Chevrolet	Corvette Z06
	2004-2005	Cadillac	CTS-V

 

Engine Block Specifications
Casting Numbers	12561168
Material	Aluminum - Sand Cast
Displacement	5.7L / 346 cid
Bore Dia.	3.898 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 Diameter	2.751 in.
Cam Housing Bore Diameter	Bore 1/5 = 2.326, Bore 2/4 = 2.317, Bore 3 = 2.307 (2002 - 2003 1st design)
	Bore 1/5 = 2.346, Bore 2/4 = 2.326, Bore 3 = 2.307 (2003 - 2004 2nd design)
Cam-to-Crank Centerline	4.914 in.

 

Rotating Assembly Specifications
Piston Material	Hypereutectic Cast Aluminum Alloy M142
Piston Style	Flat Top
Piston Volume	0cc
Wrist Pin Dia. (1997 to Mid-2004)	0.9449 in (Press-Fit)
Wrist Pin Dia. (Mid-2004 to 2005)	0.9435 in. (Full-Floating)
Connecting Rod Material	Powdered Metal
Connecting Rod Style	I-Beam
Connecting Rod Length	6.098 in.
Connecting Rod Bolts	M9 x 1 x 43
Crankshaft Material	Cast Iron
Crankshaft Main Journal	2.559 in.
Crankshaft Rod Journal	2.100 in.
Reluctor Wheel	24x
Flywheel Mounting Flange	0.857 in.

 

Cylinder Head Specifications
2001-2004 Casting Number	12564243
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 Diameter	2.000 in.
Exhaust Valve Diameter	1.550 in.
Cylinder Head Bolt Style	Torque to Yield (TTY)
Cylinder Head Bolt Size (1997-2003)	(8) M11 x 2 x 155, (2) M11 x 2 x 100, (5) M8 x 1.25 x 45
Cylinder Head Bolt Size (2004)	(10) M11 x 2 x 100, (5) M8 x 1.25 x 45

 

Cam Specifications
Year	Model	Int. Duration @ .050	Exh. Duration @ .050	Int. Lift	Exh. Lift	Lobe Separation
2001	Corvette Z06	204	211	0.525	0.525	116
2002-2004	Corvette Z06	204	218	0.555	0.551	117.5

 

Valvetrain Specifications
Lifter Style	Hydraulic Roller
Lifter Link Style	Plastic Lifter Tray
Lifter Body Diameter	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	2001 = Blue , 2002-2004 = Yellow
Valve Spring Pressure	Yellow = 90 lbs. Seat / 260 lbs. Open
Valve Angle	15 Degrees
Intake Valve Material	Steel - Hollow Stem
Intake Valve Dia.	2.000 in.
Exhaust Valve Material	Steel - Sodium Filled Stem
Exhaust Valve Dia.	1.550 in.

 

Other Specifications
Intake Manifold	LS6
Throttle Body	78mm, 3-Bolt
Throttle Control	Drive By Wire
Fuel Injector Flow	30 lb/hr @ 58 psi
Fuel Injector Length (between O-Rings)	2.500 in.
Fuel Injector Connector	EV1
PCM	Warren
Crankshaft Reluctor Ring	24x
Camshaft Sensor	Rear Mount, 1x on cam
Oil Pan (Corvette)	Bat Wing
Oil Pan (CTS-V)	Rear Sump
Oil Pump	Standard Volume