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

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.