S&S CYCLE Sidewinder® Big Bore Stroker Engine Performance Kit — 96", 3.625" bore, 4.625" stroke – 70-84 Big Twin, 80-83 Touring, 82-84 FXR, 84 Police

The Sidewinder® Big Bore Stroker Engine Performance Kit upgrades stock 74" or 80" H-D Shovelhead motors into a high-performance stroker with complete, track-proven components. 🔧

This kit contains nearly everything needed for a full big-bore conversion: 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, head and base gaskets, exhaust gaskets, and a heavy-duty top motor mount.

Designed and manufactured in the U.S.A. 🇺🇸