buick 455 exhaust manifolds. Condition is "Used". 1971 Centurion 455 manifolds. The right side is in good condition bead blasted and good pipe mounting threads. The left side is good except for the pipe mounting bolt holes. Someone broke off the bolts and drilled them off center. It was on the car and sealed good with long bolts and nuts to secure the flange. Possibly weld it up and drill and thread new holes? As is and buyer to pay actual shipping costs or pickup locally.