Speed Pro Hellfire Piston Rings 4.500" Bore File Fit 1/16 x 1/16 x 3/16" Thick - Standard Tension PROR-696RS-M1-HK AutoMeter's Mechanical Boost/Vac Gauges have

AutoMeter's Mechanical Boost/Vac Gauges have found their way into more builds than any other

1958-1958 Mercury Medalist

Contemporary design

Application specific design to ensure a perfect fit and correct operation for Unsurpassed quality you can trust

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Speed Pro Hellfire Piston Rings 4.500" Bore File Fit 1/16 x 1/16 x 3/16" Thick - Standard Tension PROR-696RS-M1-HK AutoMeter's Mechanical Boost/Vac Gauges haveTop ring is an uncoated special hardened and tempered high strength material that withstands high heat a pressure without collapsing. Standard tension oil ring to provide maximum oil control Ensures dependable performance and superior service life Application specific design to ensure a perfect fit and correct operation for unsurpassed quality that you can trustFrom pistons to engine bearing components, Speed Pro offers an array of performance engine