Cylinder Head Specs: Combustion chamber volume: 64cc; Intake runner volume: 185cc; Exhaust runner volume: 65cc; Intake valve diameter: 1. 94″; Exhaust valve diameter: 1. 55″; Valve stem diameter: 11/32″; Valve guides: Manganese bronze; Deck thickness: 9/16″; Valve spring diameter: Springs NOT Included; Rocker stud: 3/8″; Guide plate: Hardened steel; Pushrod diameter: 5/16″; Valve angle: 23°; Exhaust port location: Stock; Spark plug fitment: 14mm x 3/4 reach, gasket seat. These cylinder heads are designed exclusively for the SCCA American Sedan Series Class. To comply with class rules, there is no blending work in the intake entries, exhaust exits or bowl area of the intake or exhaust. Bare cylinder heads will require final sizing of the valve guides and a proper valve job prior to the installation of valves. These heads are engraved with a SCCA approved logo and legal for American Sedan Class. For additional information, please refer to the SCCA rule book. Match with Performer RPM intake, #7101. INSTALLATION NOTE: Match with Edelbrock head gasket sets. Bare heads will have valve guides and seats installed, but will require final sizing and a valve job to match the valves you will be using. To use stock rockers on small-block Chevy heads, . 100″ longer than stock pushrods are required. Edelbrock pushrods #9629 recommended. Use Head Bolt Kits for easy installation. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4″ reach with flat gasket seat. This head does not include valve springs due to the wide variety of camshafts used in competition. Please consult your camshaft manufacturer for appropriate valve spring selection. Deck thickness: 9/16″, rocker stud diameter: 3/8″, pushrod diameter: 5/16″ (width of slot in guide plate).
Bare Single With Valves
64cc Combustion Chamber Volume
185cc Intake/65cc Exhaust Runner Volume
1. 94 in. Intake/1. 6 in. Exhaust Valve Diameter
0. 562 in. Deck Thickness