Cylinder Head Specifications: Combustion chamber volume: 65cc, Intake runner volume: 212cc, Exhaust runner volume: 76cc, Intake valve diameter: 2.02in, Exhaust valve diameter: 1.57in, Valve stem diameter: 8mm, Valve guides: Manganese steel, Deck thickness: 5/8in, Valve spring diameter: 1.55in / 1.30in, Valve spring maximum lift: .600in, Rocker stud: N/A, Guideplate: N/A, Pushrod diameter: 5/16in, Valve angle: 15, Exhaust port location: Stock, Spark plug fitment: 14mm x .750 reach, gasket seat Designed for 1997 and later GEN 3 and 4 LS1/LS2 Chevy engines including 4.8L, 5.3L, 5.7L and 6.0L. All E-CNC Cylinder Heads feature fully CNC'd intake ports, combustion chambers and exhaust ports for improved air-flow. Dyno tests proved these heads are capable of 457 hp and 438 ft-lbs. of torque. High-quality conical beehive springs are secured with steel retainers and valve locks for performance up to .600in valve lift. Match with any one of Edelbrock's LS series intake manifolds and camshafts for a dyno-proven performance combination. Rocker bolt kit No.8597 includes 8 rocker bolts that are shorter than stock to prevent the bolts from protruding into the intake ports. E-CNC 215 head is 50-state street legal. Match with Edelbrock head gasket sets. IMPORTANT NOTES: E-CNC heads feature fully CNCd intake ports, combustion chambers and exhaust ports for improved air-flow. Dyno tests proved these heads are capable of 457 hp and 438 ft-lbs. of torque. Includes high-quality conical beehive springs secured with steel retainers and valve locks for up to .600Gg valve lift. Rocker bolt kit No.8597 includes 8 rocker bolts that are shorter than stock to prevent the bolts from protruding into the intake ports. Deck thickness: 5/8in, pushrod diameter: 5/16in.

This Part Fits:

Year	Make	Model	Submodel
2001-2004	Avanti	II	Base
2006-2007	Cadillac	CTS	V
2010-2015	Chevrolet	Camaro	SS
1998-2002	Chevrolet	Camaro	Z28
1998-2002	Chevrolet	Camaro	Z28 SS
2003	Chevrolet	Corvette	50th Anniversary Edition
2003	Chevrolet	Corvette	50th Anniversary Edition Pace Car
1997-2013	Chevrolet	Corvette	Base
2010-2013	Chevrolet	Corvette	Grand Sport
1998	Chevrolet	Corvette	Indianapolis 500 Pace Car
2014-2017	Chevrolet	SS	Base
2005-2006	Chevrolet	SSR	Base
2006-2009	Chevrolet	Trailblazer	SS
1998-2002	Pontiac	Firebird	Formula
1998-2002	Pontiac	Firebird	Trans Am
2009	Pontiac	G8	GXP
2004-2006	Pontiac	GTO	Base