S&S CYCLE PERFORMANCE EVOLUTION HEADS HARLEY

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S&S CYCLE PERFORMANCE EVOLUTION HEADS HARLEY S&S heads are available to be used with stock-style flat-top pistons Kits are fully assembled, and include stainless steel valves and h igh-lift (.585") springs Intake manifold 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) Optimized for smaller displacement engines Slight increase in compression (8.8:1 in an 80" motor) with 82cc chamber volume Port design increases flow, while maintaining velocity Set up for .585" maximum lift EFI compatible Made in the U.S.A. Show more