Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.040" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Oil Ring Tension: Standard AS04221 Engineered design resists spring lean

Engineered design resists spring lean and bow

8L engine using a slip fit catalytic converter

lock angle and 3/8" valve stem size

It greatly extends transmission life by preventing heat-related transmission failures

Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.040" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Oil Ring Tension: Standard AS04221 Engineered design resists spring leanHastings 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