KEITH BLACK PISTONS +.010in. Dome Top Pistons with 9.5:1 Compression Ratio. Fits Big Twin 1984-1999.

Description

Features & Benefits:-

* Bore = 3.508in.

* Stroke = 4.250in.

* 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 .001in. wider piston to wall clearance.

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

Tech Tips:-

* 9.5:1 Compression Ratio with 85cc Head Chamber Volume.

* Follow Ring End Gap & Pisto