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 |
