3-1/2" bore 9:1CR piston kit. Std

High 9:1 (53cc dome) compression ratio. Fits as a direct replacement for 1340 (80") Shovelhead models, 3-1/2" bore with stock 4-1/4" stroke. These S&S forged pistons come in an advanced alloy and skirt profiles, resulting in a quiet engine and long life, previously only achievable with cast pistons. This is an excellent choice to overhaul your stock 1340cc Shovel with a higher compression piston. Pistons include wrist pins, wrist pin clips and piston rings.