ProX  Piston  Ring  Set  BORE 66.40mm
ProX piston rings are made by OEM factories to exact specifications. ProX uses well known brands like Rikken

Japan, TP and NPR to be sure you will get the quality you might expect from our brand. All ProX piston rings can be used in cast iron bores, nickel ceramic platings (Nikasil), boron composite and electrofusion bores.

Gas-Gas MC250 (1997-2014), Gas-Gas EC250 2T (1997-2014),

PROX 02.7307