Hastings "Tough Guy" Racing Standard Piston Ring Set - Bore Size: 3.810" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Oil Ring Tension: Standard H762003XL ALL ENGINES - A re-torque

ALL ENGINES - A re-torque is recommended after initial start-up and cool-down (allow 2-3 hours for adequate cooling)

open spacer

Forged AISI/ASME certified 4340 steel with multi-stage heat treatment for improved strength

1/4 in Increments

the X1 Carbureted bypass regulator and fittings

Hastings "Tough Guy" Racing Standard Piston Ring Set - Bore Size: 3.810" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Oil Ring Tension: Standard H762003XL ALL ENGINES - A re-torqueHastings 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