Hastings "Tough Guy" Claimer Series Racing Piston Ring Set - Bore Size: 4.165" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Plasma Moly Top Ring Detroit Speed Works with the MAC Air

Works with the MAC Air Helmet Air Pumpers including our older Rugged Pumper systems like the MAC3

1968-1973 Plymouth Road Runner

2006-2013 GMC Savana 3500

axle tube without removing the rear hub assembly

Use bracket #8031 or #8036 for 1972-78

Hastings "Tough Guy" Claimer Series Racing Piston Ring Set - Bore Size: 4.165" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Plasma Moly Top Ring Detroit Speed Works with the MAC AirAffordable and designed to deliver exceptional performance, piston ring sets include choice of plasma moly or phosphate coated cast iron top rings, reverse twist cast iron second rings, and patented Flex Vent, standard tension oil control rings. Sold in eight cylinder sets. Features: Claimer Cast (C) Series includes top rings made of proprietary shell mold cast iron, phosphate coated, with a torsional top ring. Advantages of cast iron rings include: