This is our own special 2-ring series custom made for us by Wiseco. First we start out with our ultralight piston series. Then Wiseco's special machining operations make 2 ring pistons a reality. Great oil control and reduced friction. We use super thin 1mm top rings (.039") and a 2mm oil ring (.078") only. It works !
The 2 ring series is also lighter than our 3 ring ultralight......these weigh approximately 280 grams for 5.700" length rods (without pins).
Note: Rings are not included and must be ordered separately (see related products below).