Speed Pro Hellfire Piston Rings 4.375" Bore File Fit 1/16 x 1/16 x 3/16" Thick - Standard Tension Racing Radios & Components The 5" and 3 3/8

The 5" and 3 3/8 tachs are both analogue tachs with no micro processor therefore they are legal under any sanctioning body including NASCAR

44 mm Thick

1967-1968 American Motors American

1982-1996 GMC C3500

Speed Pro Hellfire Piston Rings 4.375" Bore File Fit 1/16 x 1/16 x 3/16" Thick - Standard Tension Racing Radios & Components The 5" and 3 3/8Top 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