Hastings racing piston rings deliver race-winning performance in even the most extreme applications. The low tension, low friction design provides unsurpassed combustion seating and exceptional sealing. Each set includes plasma moly, high tensile cast iron top rings; reverse twist, taper-faced cast iron second rings, and choice of standard or low tension Flex-Vent stainless steel oil control rings. Low tension oil rings make significant increases in horsepower and are for racing only. Choose from standard or file-fit ring sets. Instructions for file fitting included.Pit Stop USA offers Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.060" Top Ring: 5/64", Second Ring: 5/64", Oil Ring: 3/16" - Oil Ring Tension: Standard 2M5508065 at low everyday prices. Be sure to check out all of our products from Hastings including Hastings Racing File Fit Piston Rings.