Piston rings set -GRAND SPORT for Polini/DR piston- Vespa Polini / DR177cc -

High quality piston rings of german tuning experts Gran Sport. Ideal for all ported 177cc Polini cylinders. The standard rings are prone to twisting and breaking, especially when the outlet is opened up.

The high quality Gran Sport rings are the solution to this problem.

A must have for every ported 177cc Polini and a safety plus for non-ported barrels