Std Pistons with 10.75:1 Compression Ratio. Fits Big Twin 2007-2017 with Screamin Eagle 120R Engine - CP Carrillo Pistons Gearbox Hardware * Improved front end stability

* Improved front end stability

This 19257 kit has been upgraded to Billet style pistons to replace the Plastic pistons currently being used

* Eliminates clutch slippage

* 1/8″ NPT

* 1 Pair of WBS 1694 6×9″ Woofers

Std Pistons with 10.75:1 Compression Ratio. Fits Big Twin 2007-2017 with Screamin Eagle 120R Engine - CP Carrillo Pistons Gearbox Hardware * Improved front end stabilityFeatures & Benefits: * ID # 6918 * Bore = 4. 060 * Stroke = 4. 625 * 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 Suggested Additional Purchase: Top End Gasket Kit # CG C10082 Tech Tips: * Follow ring end gap and piston to cylinder clearances as per the