AFR 23° SBC Cylinder Head 210cc Race Ready Heads, Standard Exhaust, 65cc Chambers

AFR’s 210cc "Race Ready" cylinder heads are engineered for high-performance racing and aggressive street/strip builds up to 400 cubic inches, delivering exceptional airflow and durability. Designed to operate efficiently up to 6500-6800 RPM, these heads feature 100% CNC ported intake, exhaust, and combustion chambers, utilizing A356 aluminum castings for superior strength and precision. The Standard Exhaust configuration enhances exhaust flow, improving overall engine performance.

Specifications & Features

Material: A356 Aluminum
Intake Port Volume: 210cc
Intake Port Dimension: 2.200" H x 1.310" W x 3/8 Radius
Intake Port Location: Stock
Exhaust Port Volume: 80cc
Exhaust Port Dimension: 1.420" H x 1.545" W
Exhaust Port Location: .250" Raised
Combustion Chamber Size: 65cc
Valve Angle: 23°
Deck Thickness: .750"
Minimum Bore Diameter: 4.000"
Spark Plug Dimensions: 14mm x .750" w/Gasket Seat

Included Components

100% CNC Ported Combustion Chambers
100% CNC Ported Intake & Exhaust 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 (Max Lift .710") - AFR #8000
10° Steel Retainers - 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 - AFR #6612
Ductile Iron Intake & Exhaust Valve Seats - AFR #9060 / AFR #9070
8mm Bronze Valve Guides - AFR #9051

Flow Data

Lift (in)	Intake (CFM)	Exhaust (CFM)
.200	145	110
.300	199	158
.400	248	192
.500	285	210
.600	309	220
.650	311	222

Performance & Compatibility

The AFR 23° SBC 210cc Race Ready Heads are optimized for race and high-performance street applications, offering outstanding airflow and durability. Designed for use with aggressive cam profiles and larger displacement engines, these heads support up to 7200-7400 RPM with proper valvetrain components.