AFR 23° SBC Cylinder Head 220cc Competition Package Heads, Spread Port Exhaust, 75cc Chambers

The AFR 23° SBC Cylinder Head 220cc Competition Package is a high-performance, race-ready cylinder head designed for serious applications. With 100% CNC ported intake, exhaust, and combustion chambers, this head offers maximum airflow for intense racing or high-performance "Pro Street" builds. Constructed from A356 aluminum, it combines quality craftsmanship with high-flow performance, offering a competitive edge in any race or street scenario.

Piston Specifications

Piston Top: 100% CNC Ported Combustion Chambers, Exhaust, and Intake Ports
Approximate Compression Ratios:
- 65cc or 75cc Combustion Chamber
*For exact compression, use a compression calculator for precise adjustments.*
Engine Compatibility: Small Block Chevy (SBC)
Engine Sizes Supported: Ideal for large race engines with a minimum bore diameter of 4.000"

Technical Details

Material: A356 Aluminum
Intake Port Volume: 220cc
Exhaust Port Volume: 80cc
Intake Port Dimension: 2.220" H x 1.310" W x 3/8" Radius
Exhaust Port Dimension: 1.420" H x 1.545" W
Valve Spring Pocket Diameter: 1.580" O.D
Deck Thickness: .750"
Spark Plug Dimensions: 14mm x .750" w/Gasket Seat

Performance & Compatibility

With its race-ready design and optimized flow characteristics, the AFR 220cc Competition Cylinder Head is capable of supporting high RPMs and aggressive cam profiles. The included PAC Racing Springs, combined with 10° Steel Retainers and Bead Lock Valve Keepers, ensure stable valve operation at peak performance. Whether you're building a race engine or a high-horsepower street machine, these heads provide the airflow and reliability needed for top-tier performance.