S&S, 3-7/16" forged stroker piston kit. +.060" - 41-84 B.T. with 84" (4-1/2" stroke), 86" (4-5/8" stroke) & 88" (4-3/4" stroke) engines (NU) 597589 The grooved end of tool

The grooved end of tool is placed over the spark plug wire of running engine

Levers for all other applications are strong

Rotor rear is flat and comes with spacers

Note: When LED turn signals are used

Each caliper and bracket is precision CNC machined from billet aluminum to a high-end performance product that combines lightweight

S&S, 3-7/16" forged stroker piston kit. +.060" - 41-84 B.T. with 84" (4-1/2" stroke), 86" (4-5/8" stroke) & 88" (4-3/4" stroke) engines (NU) 597589 The grooved end of toolForged piston set. For 41 78 1200cc (74") Knuckle, Panhead, Shovel and 1340cc Shovel. Fits engines with stroker flywheels and stock 3 7 16" (1200cc) or 3 1 2" (1340cc) cylinders with stock 5. 330" length. Compression will be approx 8. 4: 1 with 4 1 2" stroke, 9. 4: 1 with 4 5 8 stroke and 10. 8 with 4 3 4" stroke. Piston dome volume 50cc. The advanced alloy and piston skirt profile for low noise and long engine life. Pistons include wrist pins, wrist