Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.000" Top Ring: 5/64", Second Ring: 5/64", Oil Ring: 3/16" - Oil Ring Tension: Standard 10000110 Exhaust crossover plugs are designed

Exhaust crossover plugs are designed mainly for use in marine or off-road applications

Black Textured Finish

Built in Mud Cover

See 54039BLS for lower shell

Withstands 2000F of intermittent heat Size: 0

Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.000" Top Ring: 5/64", Second Ring: 5/64", Oil Ring: 3/16" - Oil Ring Tension: Standard 10000110 Exhaust crossover plugs are designedHastings 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