Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.155" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Oil Ring Tension: Standard Helmet Restraint cylinder heads are ideal for

cylinder heads are ideal for racers looking for an affordable head that makes maximum power

high idle adjustment

369 in Long

Available in multiple choices of hose connections and will swivel a full 360° for easy connection in any position

Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.155" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Oil Ring Tension: Standard Helmet Restraint cylinder heads are ideal forHastings 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