Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.060" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Oil Ring Tension: Low Air Conditioning 15/16 in Jam Nut

15/16 in Jam Nut

#1209 and #1221 fit all Edelbrock carburetors

) with Chrome Plated Finish

Small Block Ford cylinder head offers high horsepower potential on competition level engines and are compatible with OE valve train and pistons for bolt-on convenience

Metric inlet thread is M10-1

Hastings "Tough Guy" Racing File-Fit Piston Ring Set - Bore Size: 4.060" Top Ring: 1/16", Second Ring: 1/16", Oil Ring: 3/16" - Oil Ring Tension: Low Air Conditioning 15/16 in Jam NutHastings 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