S&S Cycle 90-1499 S&S® Super Stock® 3-5/8" Bore Band Style Single Plug Cylinder Head Kit for 1979-'84 Big Twins - Natural Aluminum FInish crossbody Polycarbonate is hard-coated for long

Polycarbonate is hard-coated for long lasting durability and protection from engine oil and UV sunlight

Finish: Gloss Black

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50-State legal emissions replacement parts for all 2017 - later Harley-Davidson® Touring models

S&S Cycle 90-1499 S&S® Super Stock® 3-5/8" Bore Band Style Single Plug Cylinder Head Kit for 1979-'84 Big Twins - Natural Aluminum FInish crossbody Polycarbonate is hard-coated for longS&S Cycle 90 1499 S&S Super Stock band style cylinder heads for 1979 '84 HD big twins feature a stock like appearance, but flow much better than stock heads. Heads come assembled with premium valves and S&S valve springs that can handle cams with lifts up to . 590". These heads are machined for one spark plug per head and accept 3 5 8" bore cylinders. These cylinder heads are original equipment on S&S SH Series engines, and are a great upgrade for