S&S Flywheel Assembly For Harley Milwaukee-Eight When S&S Cycle has been building stroker cranks since the 50s, it becomes an artform after so many years. These kits have only gotten much stronger, durable, and trued to a spec others can only imagine. If you are looking for the perfect piece to your puzzle to your high performance engine then look no further. Features: Note: Full width wristpin connecting rods require S&S performance pistons / Tapered wristpin connecting rods compatible with stock pistons Heat treated 4140 material is harder & more than twice as strong as stock Stronger assembly eliminates need to weld crankpin Capable of higher RPM - More available power S&S High strength connecting rods are designed with Finite Element Analysis to eliminate weak spots and handle more power Perfect for gear drive cams 4-1/2 Stroke (114 or 128ci) 4-3/8 Stroke (107 or 124ci) 4-5/8 Stroke - Use S&S 131 Kits