Cylinder Head Specifications: Combustion chamber volume:-?72cc, Intake runner volume:-?280cc /290cc (Raised .650in), Exhaust runner volume:-?100cc (Raised .250in), Intake valve diameter:-?2.20in, Exhaust valve diameter:-?1.81in, Valve stem diameter:-?11/32in, Valve guides:-?Manganese bronze, Deck thickness:-?5/8in, Pushrod diameter:-?3/8in, Valve angle:-?15, Exhaust port location:-?Raised .250in, Spark plug fitment:-?14mm x 3/4 reach, gasket seat. INSTALLATION NOTE: For headers, contact TTI (951) 371-4878. Offset intake rockers required, exhaust side accepts standard-spec rockers. May require additional pushrod hole clearance for some combinations. 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. These heads require the use of a 14mm x 3/4in reach, flat gasket spark plug with a heat range appropriate to your application. Deck thickness: 5/8in, pushrod diameter: 3/8in.
