ProTru by Wiseco 23 Degree Flat Top Forged Piston and Ring Kit - 4.060 in Bore - 1/16 x 1/16 x 3/16 in Ring Grooves - Minus 5.00 cc - Small Block Chevy PTS503A6 Pumper Systems ApprovedDoes not require an MSD

ProTru by Wiseco 23 Degree Flat Top Forged Piston and Ring Kit 4.060 in Bore 1 16 x 1 16 x 3 16 in Ring Grooves Minus 5.00 cc Small Block Chevy PTS503A6 Pumper Systems ApprovedDoes not require an MSD ApprovedDoes not require an MSD Ignition ControlSupplied with an HEI style distributor cap and rotor (accepts Cap A Dapts)Polished steel shaft is QPQ coated and guided by a sealed ball bearingMaintenance 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 bushingsCNC machined billet aluminum housing and billet aluminum basePowerful built in module produces a 7 provide increased strength and a more reliable performance than stock plastic tanks