Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.085" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Oil Ring Tension: Standard RS003C0811 For all heavy-duty towing needs

For all heavy-duty towing needs

and dial chart

2004-2013 Ford F-150

Pins fit most GM blocks and are sold in pairs

Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.085" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Oil Ring Tension: Standard RS003C0811 For all heavy-duty towing needsHastings 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