AFR 23° SBC Cylinder Head 195cc Street Heads, L98 Angle Plug w/Heat Riser, 75cc

AFR 23° SBC Cylinder Head 195cc Street Heads, L98 Angle Plug w/Heat Riser, 75cc

AFR’s 195cc “Street” cylinder heads provide outstanding performance for small block Chevy applications, featuring 100% CNC ported intake, exhaust, and combustion chambers for maximum airflow efficiency. Constructed with A356 aluminum castings and high-quality components, these heads are designed for engines up to 400 cubic inches, operating up to 6500 RPM. They are CARB EO #D-250-2 compliant, making them legal for 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, 140 lbs on seat, .600″ max lift, Max RPM 6300-6500 (AFR #8017)
• 7° Chrome Moly Retainers 1.245″ O.D x .885″ I.D x .655″ I.D (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 .600″ O.D x .495″ I.D (AFR #6612)
• Hardened Valve Spring O.D Locator 1.380″ O.D x .570″ I.D (AFR #8042)
• 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)

Flow Chart Data

*Test conducted at 28″ of water (pressure) on Superflow 1020. Bore Size: 4.060″, intake 3/4″ radius plate exhaust, 1 3/4″ curved pipe.*

Specifications & Features

• Material: A356 Aluminum
• Intake Port Volume: 195cc
• Intake Port Dimension: 2.110″ H x 1.265″ W (5/16″ Radius)
• Intake Port Location: Stock
• Exhaust Port Volume: 64cc
• Exhaust Port Dimension: 1.450″ H x 1.550″ W
• Exhaust Port Location: .100″ Raised
• Combustion Chamber Size: 65cc or 75cc
• Valve Cover Bolt Pattern: Perimeter Bolt
• Valve Angle: 23°
• Valve Spring Pocket Diameter: 1.460″ O.D
• Max Valve Spring Pocket Machining: 1.750″ O.D (Do not machine spring pad any deeper.)
• 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