Hastings "Tough Guy" Claimer Series Racing Piston Ring Set - Bore Size: 4.000" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Phospate Coated Top Ring R10002S which accepts our part #81-016

which accepts our part #81-016 pressure cap or any 16 psi radiator style

Product Description: Helmet Bag

Housings are natural finish aluminum

C6 and AOD automatic transmissions

063 in Thick

Hastings "Tough Guy" Claimer Series Racing Piston Ring Set - Bore Size: 4.000" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Phospate Coated Top Ring R10002S which accepts our part #81-016Affordable 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: