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

Lift	.200	.300	.400	.500	.550	.600	.650
Intake	155	210	260	295	304	312	318
Exhaust	116	162	204	220	225	229	233

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.