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

Take your Shovelhead to the next level with the Sidewinder® Big Bore Stroker Engine Performance Kit 🔧⚙️. This comprehensive kit contains nearly everything needed to upgrade a stock 74" or 80" H-D Shovelhead to significantly greater displacement, including high-tensile cast iron Sidewinder cylinders, forged pistons with wrist pins and rings, a dynamically balanced flywheel assembly with heavy-duty connecting rods and mainshafts, stainless steel head bolts, adjustable chromoly pushrods, complete gasket sets, exhaust gaskets, and a heavy-duty top motor mount.

All components are engineered for durability and balanced for smooth operation. Professional installation is recommended; basic engine assembly tools and mechanical experience are required.

Made in the U.S.A. 🇺🇸