Crafted from high-strength A356 aluminum alloy, this performance cylinder head is built to handle serious power while delivering exceptional airflow. It features bronze valve guides, hardened valve seats, and an advanced, fully CNC-ported design across the intake ports, exhaust ports, and combustion chambers to maximize efficiency and flow consistency. A thicker deck design adds critical strength, making it ideal for high-horsepower nitrous, turbocharged, and supercharged applications. Versatility is built in with a dual valve cover bolt pattern that accepts both center-bolt and perimeter-bolt valve covers, making this head a robust, race-ready solution for demanding performance builds.
Specs & Information:
- Head Style: Small Block Chevrolet
- Material: A356 Aluminum Alloy
- Style: Bare / No Parts
- Finish: CNC Ported
- Intake Port Volume: 220cc
- Intake Port Shape: Square
- Intake Port Dimensions: 2.200″ H x 1.350″ W
- Exhaust Port Volume: 89cc
- Exhaust Port Shape: Square
- Exhaust Port Dimensions: 1.590″ H x 1.545″ W
- Combustion Chamber Volume: 72cc
- Spark Plug Style: Straight or Angled
- Spark Plug Dimensions: 14mm x .750″ with Gasket Seat
- Required Intake Valve Diameter: 2.055 in.
- Required Exhaust Valve Diameter: 1.600 in.
- Valve Length: 5.105″ (+.100″ Longer)
- Valve Cover Bolt Pattern: Dual – Perimeter & Center Bolt
- Accessory Bolt Holes Drilled: Yes
- Intake Valve Angle: 23 deg.
- Exhaust Valve Angle: 23 deg.
- Valve Guide Material: Manganese Bronze
- Valve Seats Machined: Yes
- Valve Seat Machine Style: 5-Angle
- Valve Seat Material: Ductile Iron
- Intake Manifold Bolt Pattern: Early & Late SB Chevy
- Steam Holes: Available with and without Steam Holes
Important Notes:
- Bare Head Only (Does NOT include any hardware)
- This listing is for One Cylinder Head ONLY
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Disclaimer:
This product is legal for off road use and non pollution controlled vehicles (1965 & older); however, it has not been tested or approved by the California Air Resources Board (CARB) for highway vehicles in the state of California. By purchasing this product, buyer agrees it will not be used on pollution controlled vehicles in California, or in a state with similar emissions regulations.
WARNING: Cancer and Reproductive Harm – www.p65warnings.ca.gov
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