These replacement pistons were designed specifically by Jim to be a direct replacement piston set for your crate or Harley built 135 cubic inch engine. Simply pull your old pistons, dingle berry hone the cylinders and install the new pistons! These pistons in combination with Jim’s M835B (MORE TQ / LESS HP), M837B (BALANCED TQ & HP) or M839B (MORE HP / LESS TQ) camshaft and a good exhaust will have you making 160+ torque and 165+ horsepower in a Gen 2 engine! With the correct combination of parts, we have even seen 170-178 horsepower! These pistons get the job done!

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 135 crate engine.

4.310” Bore X 4.625” Stroke M8 configuration.

Jim recommends a .020” set of base gaskets with Screamin Eagle 4.310” cylinders and .030”-.040” set of head gaskets. Your head gasket thickness needs to be calculated based on your cam choice as well as your cylinder head final cc.