Standard Piston Rings. Fits Big Twin 1966-1999 & Sportster 1986-2003 with 3-5/8in. Bore.

Features & Benefits:-

* Fits 1600 Series Pistons

* The Series will be a Number inside the Piston crown.

* Moly Faced.

* Sold as a Pair.

Tech Tips:-

* 1.5mm wide compression ring & 4.2mm wide oil ring.

Proudly Made in the USA by S&S Cycle !