AFR 23° SBC Cylinder Head 220cc Race Ready Heads, Standard Exhaust, 75cc Chambers

AFR 23° SBC Cylinder Head 220cc Race Ready Heads, Standard Exhaust, 75cc Chambers

AFR’s 220cc “Race Ready” and “Competition” heads feature 100% CNC ported intake, exhaust, and chambers, A356 aluminum castings, and high-quality components throughout. This is AFR’s largest, best-flowing head for use with conventional rocker arms. Recommended for race applications or radical “Pro Street” style builds.

Included Components

• 100% CNC Ported Combustion Chambers
• 100% CNC Ported Exhaust Ports
• 100% CNC Ported Intake Ports
• Competition 5-angle Valve Job
• 8mm Bead Lock Intake Valve, 2.100″ x 5.000″ Overall Valve Length – AFR #7256
• 8mm Bead Lock Exhaust Valve, 1.600″ x 5.030″ Overall Valve Length – AFR #7254
• PAC Racing Spring 1.550″ OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710″ maximum lift – AFR #8000
• 10° Steel Retainers 1.500″ O.D x 1.120″ I.D x .705″ I.D – AFR #8511
• 10° Bead Lock Valve Keepers with lashcap recess – AFR #9009
• ARP 7/16″ Rocker Studs – AFR #6405
• Adjustable 5/16″ Guide Plates – AFR #6103
• Viton Valve Seals .600″ O.D x .495″ I.D – AFR #6612
• Hardened Valve Spring I.D Locator 1.550” O.D x .780” I.D – AFR #8048
• Ductile Iron Intake Valve Seats 2.200″ O.D x 1.750″ I.D x .375″ Deep – AFR #9060
• Ductile Iron Exhaust Valve Seats 1.696″ O.D x 1.325″ I.D x .305″ Deep – AFR #9070
• 8 mm Bronze Valve Guides .502″ O.D x 2.100″ O.A.L – AFR #9051

220cc Race Ready™ Head Flow Chart

Specifications & Features

• Material: A356 Aluminum
• Intake Port Volume: 220cc
• Intake Port Dimensions: 2.220″ H x 1.310″ W x 3/8 Radius
• Intake Port Location: Stock
• Exhaust Port Volume: 80cc
• Exhaust Port Dimensions: 1.420″ H x 1.545″ W
• Exhaust Port Location: .250″ Raised
• Combustion Chamber Size: 65cc or 75cc
• Valve Angle: 23°
• Deck Thickness: .750″
• Minimum Bore Diameter: 4.000″
• Flat Mill: .006″ per cc, 60cc Maximum
• Angle Mill: .009″ per cc, 55cc Maximum
• Minimum Cross Sectional Area: 2.180 sq. in.
• Spark Plug Dimensions: 14mm x .750″ w/Gasket Seat

Legal Disclaimer

CARB Status: These products are illegal to operate on any public highway. This means any public paved or unpaved roadway or in a public park. These products are only legal if used on a dedicated racing vehicle. Violation is subject to a maximum penalty of $37,500 per violation per vehicle, revocation of registration by DMV, loss of use on public right-of-ways, and proof of correction of the tampering.