S&S CYCLE Sidewinder® Big Bore Stroker Engine Performance Kit — 93", 3.625" bore, 4.5" stroke, Black – 70-84 Big Twin, 80-83 Touring, 82-84 FXR, 84 Police

Sidewinder® Big Bore Stroker Engine Performance Kit delivers a comprehensive upgrade for stock 74" or 80" H-D. Shovelhead engines. ⚙️🇺🇸

• Complete Sidewinder big-bore stroker kit with cast iron Sidewinder cylinders and forged pistons, wrist pins, and rings.
• Dynamically balanced S&S flywheel assembly complete with heavy-duty connecting rods and mainshafts for improved rotational stability.
• Includes S&S stainless steel head bolts, base nut, S&S adjustable chromoly pushrods, head gaskets, base gaskets, exhaust gaskets, and a heavy-duty top motor mount.
• Contains nearly everything needed to take a stock engine to a larger displacement without sourcing separate components.

Engineered and manufactured in the U.S.A. for dependable street performance and long-term durability.