AFR 180 LT1 Street Ported Cylinder Heads - 65cc

AFR 180 SB Chevy LT1 Street Ported Cylinder Heads - (AFR-0909) The Small Port, High Velocity Torque Monster These AFR 180cc LT1 Eliminator Street heads are emissions-legal (CARB E.O. #D-250-2 for engines up to 1994), and are available in the LT1 angle plug version only. These heads feature a 65cc combustion chamber with a 64cc exhaust port and a 3/4 inch thick head deck (ideal for nitrous or blower applications). Valves are lightweight stainless steel 8mm stem, 2.020" dimeter intakes and 1.600" diameter exhausts along with AFR's hardened ductile iron interlocking valve seats. Standard valvetrain consists of AFR 8017 LS style valve springs and CHE titanium retainers with many other spring packages available. Their exceptional flow characteristics, ideal operating range of just off idle to 6,000 RPM (higher RPM ranges are possible, depending on the combination of parts). 23 degree valve angle and standard valve spacing make AFR 180cc LT1 Eliminator Street heads a perfect for 350 to 3