Std Dome Top Pistons with 10.5:1 Compression Ratio. Fits Twin Cam Twin Cam 2007-2017 with 103ci Engine & Big Bore 96ci to 103ci Conversion. - Keith Black Pistons

Features & Benefits:-

* Bore = 3.875"

* Stroke = 4.375"

* 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:-

* 10.5:1 Compression Ratio with 85cc Head Chamber Volume.

* Follow Ring End Gap & 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.