AFR 23° SBC Cylinder Head 195cc Street Heads, L98 Angle Plug w/Heat Riser, 65cc Chambers

The AFR 195cc SBC Street Cylinder Heads are designed for high-performance street applications, delivering exceptional airflow and efficiency. Featuring 100% CNC-ported intake, exhaust, and combustion chambers, these heads are crafted from durable A356 aluminum castings with top-quality components. Recommended for small-block Chevy engines up to 400 cubic inches, operating at up to 6500 RPM. These heads are CARB-certified under EO #D-250-2 for use in 1994 and older emissions-controlled vehicles.

Included Components

100% CNC Ported Combustion Chambers
90% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.050" x 4.900" Overall Valve Length (AFR #7252)
8mm Bead Lock Exhaust Valve, 1.600" x 4.950" Overall Valve Length (AFR #7250)
PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring (AFR #8017) - 140 lbs on seat, .600" max lift, Max RPM 6300-6500
7° Chrome Moly Retainers (AFR #8514)
7° Bead Lock Valve Keepers (AFR #9007)
ARP 3/8" Rocker Studs (AFR #6409)
Adjustable 5/16" Guide Plates (AFR #6103)
Viton Valve Seals (AFR #6612)
Hardened Valve Spring O.D Locator (AFR #8042)
Ductile Iron Intake Valve Seats (AFR #9060)
Ductile Iron Exhaust Valve Seats (AFR #9070)
8mm Bronze Valve Guides (AFR #9051)

Performance Flow Chart (CFM at 28" of Water Pressure)

Lift (in.)	.200	.300	.400	.500	.550
Intake (CFM)	146	201	247	275	280
Exhaust (CFM)	119	166	197	213	218

Technical Specifications

Material: A356 Aluminum
Intake Port Volume: 195cc
Intake Port Dimensions: 2.110" H x 1.265" W
Intake Port Location: Stock
Exhaust Port Volume: 64cc
Exhaust Port Dimensions: 1.450" H x 1.550" W
Exhaust Port Location: .100" Raised
Combustion Chamber Size: 65cc
Valve Cover Bolt Pattern: Perimeter Bolt
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: 1.905 sq. in.
Spark Plug Dimensions: 14mm x .750" w/Gasket Seat

Performance & Compatibility

The AFR 195cc Street Cylinder Heads provide superior airflow and durability for high-performance SBC applications. Designed to enhance power output in street-driven and performance engines, these heads are optimized for efficiency, throttle response, and longevity.