Std Pistons with 11.0:1 Compression Ratio. Fits Milwaukee-Eight 2017up with Big Bore 114ci to 128ci Engine. - S&S

Features & Benefits:-

* Bore = 4.250″

* Stroke = 4.500″

* Forged from high strength 2618 Alloy

* Fully CNC machined & designed for maximum performance, horsepower and reliability.

* Balanced to +/- 1 gram

* Double forced pin oilers

* Proudly Made in the USA

* Complete kit includes: two pistons, rings, wrist pins and clips.