S&S, 3-1/2" Replacement Cast Piston Kit. +0.020" For Harley-Davidson

Stock replacement cast piston with flat top.
An excellent option for repairing your stock Evolution Big Twin.
3-1/2" bore with 4-1/4" stock stroke.
With a standard compression ratio of 8.5:1.
Pistons include wrist pins, wrist pin clips, and piston rings.
Note: In each and every application, the technician must be able to evaluate the suitability of the components in combination with the other engine components prior to installation.
It is important that an experienced mechanic installs and makes any necessary adjustments.
The driver must follow standard break-in and driving procedures for rebuilt engines.

Compatible with: Evo Big Twin > 84-99