Total Seal Classic Race Piston Rings 4.250" Bore File Fit 1/16 x 1/16 x 3/16" Thick - Standard Tension H777C06S ApprovedSupplied with a HEI style 39703 Size:Small (48) 6 Head Bolt Design GMP19170419

Total Seal Classic Race Piston Rings 4.250" Bore File Fit 1 16 x 1 16 x 3 16" Thick Standard Tension H777C06S ApprovedSupplied with a HEI style 39703 Size:Small (48) 6 Head Bolt Design GMP19170419 ApprovedSupplied with a HEI style distributor cap and rotor (accepts Cap A Dapts)Mechanical advance assembly can be locked out for crank trigger systemsPolished steel shaft is QPQ coated and guided by sealed ball bearingsMaintenance free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm rangeVacuum advance canister for improved economy (can be locked out)Easy to adjust mechanical advance with supplied springs and stop bushingsPowerful built in module produces a 7 This wheel is based off our most popular selling wheel of all time the 838 model