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

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

The AFR 195cc SBC Street Cylinder Head is designed for high-performance street applications, featuring 100% CNC ported intake, exhaust, and combustion chambers. Constructed from high-quality A356 aluminum castings, this cylinder head is ideal for small-block Chevy engines up to 400 cubic inches, operating up to 6500 RPM. These heads are CARB legal for 1994 and older emissions-controlled vehicles under EO #D-250-2.

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 Length) – AFR #7252
• 8mm Bead Lock Exhaust Valve (1.600″ x 4.950″ Overall Length) – AFR #7250
• PAC Racing Spring 1.290″ OD Hydraulic Roller Dual Valve Spring (140 lbs on seat, .600″ max lift, 6300-6500 Max RPM) – AFR #8017
• 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

Test conducted at 28″ of water pressure on Superflow 1020, Bore Size: 4.060″

Specifications & Features

• Material: A356 Aluminum
• Intake Port Volume: 195cc
• Intake Port Dimension: 2.110″ H x 1.265″ W 5/16 Radius
• Exhaust Port Volume: 64cc
• Exhaust Port Dimension: 1.450″ H x 1.550″ W
• 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 (may require .120″ thick intake gasket)
• 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 are engineered for strong mid-range torque and top-end power, making them a great choice for performance street cars and mild racing applications. Their high-flowing CNC-ported design ensures excellent airflow, supporting up to 6500 RPM. Recommended for small-block Chevy engines with displacements up to 400 cubic inches.