S&S Super Stock Natural Cylinder Head Kit for Harley Davidson 1984-99 Evo Big Twin with 3.5 in. bore - Tan S&S heads give great performance now, and work perfectly with additional upgrades later Kits are fully assembled, and include stainless steel valves and high-lift springs (up to .640 lift) Available in natural and black powder-coat finish Intake manifold, pistons and gasket kits are sold separately; gasket kits contain head gaskets, base gaskets and exhaust pipe gaskets (rocker box gaskets are not included due to the variety of available rocker box styles) Must reuse stock headbolts