LONESTAR IS ALSO GOING TO OFFER THE O RING PISTONS IN THE 1967-69 4 PISTON CAMARO CALIPER. THIS SERVICE IS BRAND NEW TO LONESTAR. CALIPERS ARE REMANUFACTURED WITH THE SAME GREAT QUALITY BUT WE USE O RING PISTON AND SEALS INSTEAD OF LIP SEAL. CALL FOR FULL DETAILS. CORES MUST BE RECEIVED IN ADVANCE OR A CORE CHARGE WILL BE CHARGED.