Speed Pro Hypereutectic Piston - 4.030 in Bore - 5/64 x 5/64 x 3/16 in Ring Grooves - Minus 4.00 cc - Coated Skirt - Small Block Chevy - Set of 8 AA0220BG2T57 Features:CNC machined billet aluminum housing Size:6-7/8 (55) Stainless steel T bolt ATM7012 12-600-4

Speed Pro Hypereutectic Piston 4.030 in Bore 5 64 x 5 64 x 3 16 in Ring Grooves Minus 4.00 cc Coated Skirt Small Block Chevy Set of 8 AA0220BG2T57 Features:CNC machined billet aluminum housing Size:6 7 8 (55) Stainless steel T bolt ATM7012 12 600 4 Features:CNC machined billet aluminum housing and billet aluminum baseMust be used with an MSD Ignition ControlSupplied with an HEI style distributor cap and rotor (accepts Cap A Dapts)Mechanical advance assembly can be locked out for crank trigger systemsAdvance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reductionPolished steel shaft is QPQ coated and guided by a sealed ball bearingEasy to adjust mechanical advance with supplied springs and stop bushingsNo CARB Exemption Order Number 197 301 ALTERNATOR