AFR 23° SBC Cylinder Head 210cc Competition Package Heads, Spread Port Exhaust, 65cc Chambers

AFR 23° SBC Cylinder Head 210cc Competition Package Heads, Spread Port Exhaust, 65cc Chambers

AFR’s 210cc “Race Ready” and “Competition” cylinder heads are precision-engineered for maximum airflow and performance. Featuring 100% CNC-ported intake, exhaust, and combustion chambers, these heads are constructed from high-quality A356 aluminum castings, making them ideal for race applications and aggressive street/strip builds up to 400 cubic inches. Designed to operate up to 6500-6800 RPM, they deliver outstanding performance for competitive engines.

Key Features

• Chamber Size: 65cc
• Porting Finish: Competition
• Spread Port Exhaust: Yes
• Material: A356 Aluminum
• Intake Port Volume: 210cc
• Exhaust Port Volume: 80cc
• Valve Angle: 23°
• Deck Thickness: .750″
• Minimum Bore Diameter: 4.000″

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, 2.080″ x 5.000″ Overall Valve Length (AFR #7255)
• 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″ max lift, Max RPM 7200-7400 (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 (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)
• 8mm Bronze Valve Guides .502″ O.D x 2.100″ O.A.L (AFR #9051)

Performance Flow Data

Test Conditions: 28″ of water on Superflow 1020, Bore Size: 4.060″, intake 3/4″ radius plate exhaust, 1 3/4″ curved pipe.

CARB Compliance

Warning: This product is not legal for sale or use on emission-controlled vehicles. Intended for dedicated race vehicles only.