JIM’S V-TWIN 4.310” / 131 CUBIC INCH M8 “STREET” PISTONS

***These pistons are designed specifically for the Gen-1 cylinder heads & combustion chamber.

So you’ve upgraded your M8 engine to the highly sought after Screamin’ Eagle Stage 4 131 cubic inch engine package. It was great at first, however now you have gotten used to it and you are craving more! You’re not alone! We hear this time and time again! The pistons that come with the Stage IV kit are ok, however they are not GREAT!

These replacement pistons were designed specifically by Jim to be a direct replacement piston set for your crate or Harley built 131 engine. Simply pull your old pistons, dingle berry hone the cylinders and install the new pistons!

CP Carillo manufactures the pistons to Jim’s specs. They are then coated by Calico Coatings with the very same coating that goes onto every piston in a NASCAR engine! After coating, each piston set is personally inspected and packaged by Jim to ensure product consistency.

Piston kit comes complete with: Pistons / Ring Set / Wrist Pins / Wrist Pin Clips

Designed for the Harley Davidson Screamin’ Eagle 131 Stage 4 engine: 4.310” Bore & 4.500” Stroke

EDV : +.58cc