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Ships within 48 hours · Estimated delivery Oct 15 - Oct 20
Bolt-on big bore kits mean easy installation with no machining and no rebalancing
2006-2007 Harley Davidson FLHR Road King
Sprocket Teeth: 12
2007-2009 Yamaha WR450F
S&S Cycle 90-1504 Super Stock EVO Cylinder Heads - Black drive-sprockets-front-sprockets Bolt-on big bore kits meanS&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
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