S&S CYCLE Piston Kit 80" Stock Big Twin — 80", 3.530", 4-1/4" – 36-84 Big Twin, 79-83 Touring, 82-84 FXR, 84 Police

Forged pistons engineered for superior strength and durability for stock Big Twin motors. 🔧

Piston kits include a complete set of pistons, rings, wristpins, and clips for straightforward installation. 🛠️

Wrist pin deck height is 1.270" and the kit is made in the U.S.A.

Requires the use of connecting rods with a rod length of 7.440" (standard OEM #24281-74A); use of earlier rods with a 7.470" length may slightly raise compression (about one-half point) and can cause clearance issues—check piston-to-cylinder-head clearances carefully.