S&S® partially assembled cylinder heads for 1936-'47 HD® OHV big twins are cast from high tensile, engineering grade gray iron for better than original strength, optimum heat dissapation, and low noise transfer. Kit includes front and rear cylinder heads complete with valves and .480 lift valve springs, S&S® knuckle covers, rocker arms, rocker shafts, die-cast "tins", and top covers.
This is a special order part, so kit contents vary with selected options.
Options include: spark plug size (stock18mm or 14mm), knuckle cover finish (as cast or polished), intake manifold style (stock plumber or oring), install guides for S&S® "tins" or don't install guides to use stock "tins", top cover finish (chrome, black, or silver), and cylinder heads may be ordered unpainted.
Download a special order sheet at www.sscycle.com/dealer-center/special-order-forms
Stock 1948-'65 head bolts can be used in stock bore applications. Big bore applications must use S&S® 12 point head bolts.