Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.145" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Oil Ring Tension: Standard I Beam Connecting Rod Shoulders Adjust from 15" to

Shoulders Adjust from 15" to 40"

Earmuffs: Noise attenuating

BBK under drive pulley kits are vehicle specific and each kit comes with complete installation instructions and allow the re-use of existing serpentine belts

Chevrolet: LCF 4500 20 - 21 6

Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.145" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Oil Ring Tension: Standard I Beam Connecting Rod Shoulders Adjust from 15" toHastings 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