Description
Low-port 18deg aluminum cylinder head for maximum-effort competition engines. Offers significant improvements over conventional head designs with 18 deg valve angles (vs. older 23deg angles) and 43cc combustion chambers. Spark plug holes are centrally located and valve center lines are relocated. Exhaust ports are high-flow. Head face has an extra 0.080 of material for 9.1:1 compression and up to 2.200 intake valves can be used. Shallow wedge-shaped combustion chambers allow builders to shallow wedge-shaped combustion chambers allow builders to achieve high compression ratios with small domes. Heads do not include valve seats or guides. Aftermarket shaft-mounted rocker arm assemblies and push rods are required. Piston domes and valve pockets must be matched to the revised combustion chamber design.
