KEITH BLACK PISTONS +.050in. Dome Top Pistons with 8.2:1 Compression Ratio. Fits Sportster 1972-1985 with 1000cc Engine.

Description

Features & Benefits:-

* Bore = 3.238in.

* Stroke = 3.812in.

* Fits Iron Head Sporty.

* Hypereutectic Alloy is a cast 16% silicon content material.

* Perfect for air cooled engines.

* Low thermal expansion rate = tighter piston-to-cylinder clearance.

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

* Replaces OEM # 22257-83

Tech Tips:-

* 8.2:1 Compression Ratio with 110cc Head Chamber Volume.

* Follow Ring