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Polyamide stretch inserts for abrasion resistance and enhanced freedom of movement
2007-2016 Harley Davidson FLHR Road King
Complete kit that dramatically boosts the power output
base nuts and base gaskets
S&S Cycle 106-4277 Super Stock 79cc Cylinder Head Kit - .640in. Lift Springs - Silver Powder-Coat helmets-modular-helmets-snow Polyamide stretch inserts for abrasionCompression release machining Must use S&S rocker boxes (PART #90 4110) if S&S compression releases are used. High port flow gives great performance now, and more later when additional upgrades are done. Heads are fully assembled with springs and valves, and are available in silver or black powder coat finish to match OEM components. Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement. Heads are machined
