+.010in. Pistons with 10.75:1 Compression Ratio. Fits Big Twin 2007-2017 with 103ci & Big Bore 96ci to 103ci Twin Cam Engine. - CP Carrillo Pistons

Features & Benefits:-

* ID # 4978

* Bore = 3.885"

* Stroke = 4.375"

* Fully CNC machined

* Balanced to +/- 1 gram

* Double forced pin oilers

* Forged from high strength 2618 alloy

* Designed for maximum performance, horsepower and reliability

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

Tech Tips:-

* Suggested additional purchase - top end gasket kit # CG-C9147

* Follow ring end gap and piston

to cylinder clearances as per the supplied manufacturers instructions

* Pull the engine down first & measure the existing bore to determine if oversize pistons are required PRIOR to purchase, we do not take back piston kits. The onus is on the assembling technician to validate the cylinders & required pistons.

Proudly made in the USA by CP Carrillo Pistons!