Piston Kit S&S Cycle 100" 107" Super Sidewinder Evo Softail Touring FXR Dyna SpoPiston Kit S&S Cycle 100" 107" Super Sidewinder Evo Softail Touring FXR Dyna Sportster 4" std bore S&S CYCLE 92 1400 92 1400 Piston Kit for S&S Motors Piston Kit For 100" 107" Super Sidewinder 4. 000" Standard Piston kit includes forged pistons (unless noted) rings, wrist pins and clips for a complete motor replacement Made in the U. S. A Product Name Piston Kit Type Replacement Piston Material Forged Bore Size 4. 000" Bore Oversize Standard Bore