AFR 23° SBC Cylinder Head 210cc Competition Package Heads, Standard Exhaust, 75cc Chambers

AFR's 210cc "Race Ready" and "Competition" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings, and high-quality components throughout. Recommended for race applications and aggressive street/strip builds up to 400 cubic inches, operating up to 6500-6800 RPM.

Specifications & Features

Material: A356 Aluminum
Intake Port Volume: 210cc
Intake Port Dimensions: 2.200" H x 1.310" W x 3/8 Radius
Exhaust Port Volume: 80cc
Exhaust Port Dimensions: 1.420" H x 1.545" W
Combustion Chamber Size: 75cc
Valve Angle: 23°
Valve Cover Bolt Pattern: Perimeter Bolt
Deck Thickness: .750"
Spark Plug Dimensions: 14mm x .750" w/Gasket Seat
CARB Status: This product is not legal for sale or use on emission-controlled vehicles and is intended for dedicated race vehicles only.

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" (AFR #7255)
8mm Bead Lock Exhaust Valve, 1.600" x 5.030" (AFR #7254)
PAC Racing Spring 1.550" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710" max 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 (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)

210cc Race Ready™ Head Flow Chart

Lift	.200	.300	.400	.500	.550	.600	.650
Intake	145	199	248	285	301	309	311
Exhaust	110	158	192	210	214	220	222

Performance & Compatibility

Designed for serious performance applications, these heads maximize airflow and efficiency. Best suited for engines up to 400 cubic inches, they deliver peak power between 6500-6800 RPM. Not legal for emission-controlled vehicles.