Hastings "Tough Guy" Claimer Series Racing Piston Ring Set - Bore Size: 4.030" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 1/8" - Plasma Moly Top Ring 130913 Ultra-Flex 650

Ultra-Flex 650

Use with W2 Heads

Innovations include: FIRST with a state-of-the-art on-site new product development program which carefully analyzes various vehicle reactions equipped with Energy's Performance Polyurethane technology FIRST with the largest product line in the industry for both import and domestic vehicles

Real carbon fiber cover is strong yet lightweight and attaches to all Jacobs Ladders with existing bolt or pin (not included)

Hastings "Tough Guy" Claimer Series Racing Piston Ring Set - Bore Size: 4.030" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 1/8" - Plasma Moly Top Ring 130913 Ultra-Flex 650Affordable 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: