Two hole lock washers used on all 1964-81 Oldsmobile V8 engines except 1964 394. Locks attach to front two bolts and rear two bolts on the exhaust manifolds. Four locks used per car, sold individually.
Hot air pipe filter used in bottom of exhaust manifold tube where it attaches to manifold shroud. Prevents debris from entering pipe into air cleaner. Part replaces GM number 230725. Used on all 1968-69 Cutlass and 442 V8 models, 1970-71 442 455 V8, 1972 455 4 Barrel with manual transmission and Outside Air Induction, and 1973 455 V8.