S&S Cycle Super Stock 89cc Cylinder Head Kit - .640in. Lift Springs - Winkle Black 90-1106High 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 for compression releases (sold separately); S&S rocker boxes required when using S&S compression releases Do not
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S&S Cycle Super Stock 89cc Cylinder Head Kit - .640in. Lift Springs - Winkle Black 90-1106