Carrillo M5112 High-Performance Forged Pistons for Harley Milwaukee-Eight 128ci Big Bore

The Carrillo M5112 is a premium forged piston kit designed for Harley-Davidson Milwaukee-Eight engines with big bore configurations. Engineered for 128 cubic inches with a 4.250" bore, 4.500" stroke, and 12.0:1 compression ratio, these pistons deliver maximum performance for high-output applications.

Key Features:

• Made from 2618 forged and heat treated alloy for superior strength and durability
• Forced pin oilers and advanced cam and barrel skirt profiles for optimal lubrication
• Steel gas nitride coated top ring, ductile iron Napier 2nd ring, and three piece flex vent oil ring
• X-forging for lighter weight without sacrificing strength
• Double pin oilers ensure consistent lubrication under high-stress conditions
• Designed to accommodate +1mm larger valves and high lift cams if needed
• 1.080" compression height with +2.6cc dome volume

What's Included:

• Complete kit includes two pistons, ring sets, wrist pins and clips

Held to the most detailed inspection and tolerances, CP Carrillo pistons are precision-machined to deliver race-proven performance and reliability for Milwaukee-Eight big bore builds. Fits Milwaukee-Eight Touring (2017-up) and Softail (2018-up) models with 114ci to 128ci big bore engine configurations.