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- 18° V6 Aluminum Race Cylinder Head
- 43cc Chamber
- 215cc Intake Runner
- Bare, Sold Individually
Technical Specifications: - Intake Port Shape: Rectangular
- Intake Port Location: Raised
- Exhaust Port Shape: Oval
- Exhaust Port Location: Raised
- Spark Plug Style: Angle
- Maximum Intake Valve Diameter: 2.200 in.
- Maximum Exhaust Valve Diameter: 1.620 in.
- Valve Cover Mounting Style: Perimeter Bolt
- Accessory Bolt Holes Drilled: Yes
- Oiling Style: Through Pushrod
- Heat Crossover: No
- The Chevrolet Performance 18-Degree V6 Aluminum Race Cylinder Head offers a significant improvement over conventional Chevrolet designs. They feature an 18 valve angle vs. the older 23 angle design with 43cc chambers. They also feature relocated valve centerlines, shallow combustion chambers, centrally located spark plugs and high-flow exhaust ports. The relocation of valve centerlines (.275" toward the intake manifold) minimizes shrouding at high lift and also allows the installation of larger valves (up to 2.20" diam. intake valves in some applications). These changes produce a substantial improvement in total airflow potential! Raised intake runners maintain the runner/port relationship with the revised 18-degree valve angle. This low-port version has excellent flow at low valve lifts due to their tall short-side radiuses and deep valve bowls. The shallow wedge-shaped combustion chambers allow builders to achieve high compression ratios with small piston domes. Spark plugs are .350" closer to the center bore than previous designs which improve flame travel across the chamber and reduce spark advance requirements. High-flow exhaust ports are .450" higher and .240" wider at exhaust manifold flange than previously. This minimizes turbulence in the runner and provides a smooth transition from the valve bowl to the header pipe for increased exhaust flow. Engineered to be the cylinder head for maximum effort V6 Competition!Technical Notes:
- Sold without valve seats and valve guides
- Valves with .300" longer-than-stock stems are recommended for low-port V6/90-degree 180 heads
- 400" longer -than -stock valves are recommended for high-port 18-degree heads
- Aftermarket shaft-mounted rocker-arm assemblies and pushrods are required
- Piston domes and valve pockets must be matched to the revised combustion chamber design
- Aftermarket head bolts with small diameter heads are recommended
Part TypeCylinder Head
Product LineChevrolet Performance 18-Degree V6 Aluminum Race Cylinder Head
BrandCHEVROLET PERFORMANCE
Package Height5.3
Package Width8.8
Package Length17.7
Weight20.15 PG
Part CategoryPerformance Parts
Cylinder Head MaterialAluminum
Intake Port LocationRaised
Exhaust Valves IncludedNo
Locks IncludedNo
Retainers IncludedNo
Guideplates IncludedNo
Rocker Arms IncludedNo
Oiling StyleThrough pushrod
Rocker Arm Nuts IncludedNo
Cylinder Head FinishNatural
Valve Seats MachinedNo
Intake Valve Angle18
Heat CrossoverNo
Valve Springs IncludedNo
Spark Plug StyleAngled
Damper Spring IncludedNo
Valve Guides IncludedNo
Cnc-Machined Intake RunnerNo
Intake Valves IncludedNo
QuantitySold individually
Valve Stem Seals IncludedNo
Intake Valve Diameter2.15 in (54.61 mm)
Accessory Bolt Holes DrilledYes
Exhaust Port LocationRaised
Combustion Chamber Volume (Cc)43
Machined For O-RingNo
Exhaust Valve Angle18
Steam Holes DrilledNo
Rocker Arm Studs IncludedNo
Cylinder Head StyleBare
Part FitmentSemi Universal
Valve Cover Mounting StylePerimeter bolt
Intake Runner Volume (Cc)215
Cnc-Machined Exhaust RunnerNo
Cnc-Machined Combustion ChamberNo
Exhaust Valve Diameter1.62 in (41.148 mm)
Vendor Part Number10134359
Package Qty1
Package TypeEA
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