Std Flat Top Pistons with 10.0:1 Compression Ratio. Fits Twin Cam 2007-2017 with 103ci Engine & also Converts Twin Cam 2007-2017 96ci Engine to 103ci. - Keith Black Pistons Custom or Universal Solo Seats * Follow Ring End Gap

* Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied Manufacturers Instructions

* Not enough axle adjustment for the new pulley

* Will Not Fit Fatboy 2018up

* Fits XL883 Sportster 883 1992-2003

* Minor clearancing of switch housing is sometimes required to allow switch to function freely

Std Flat Top Pistons with 10.0:1 Compression Ratio. Fits Twin Cam 2007-2017 with 103ci Engine & also Converts Twin Cam 2007-2017 96ci Engine to 103ci. - Keith Black Pistons Custom or Universal Solo Seats * Follow Ring End GapFeatures & Benefits: * Bore = 3. 875 * Stroke = 4. 375 * Flat Top with slight hollow Dome. * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined. * Best resistance to cracking in hi comp performance applications. * Require . 001 wider piston to wall clearance. * Anti Friction skirt coating. * Complete kit includes: two pistons, rings, wrist pins and clips. Tech Tips: * 10. 0: 1 Compression Ratio with 85cc