OER Parts offers a wide selection of Oil System & Parts for your 1973 Pontiac Firebird. OER Parts offers 1973 Pontiac Firebird Bypass Valves, 1973 Pontiac Firebird Dipsticks and Tubes, 1973 Pontiac Firebird Filter Adapters, 1973 Pontiac Firebird Oil Coolers, 1973 Pontiac Firebird Oil Filters, 1973 Pontiac Firebird Oil Pan Baffles, 1973 Pontiac Firebird Oil Pans, 1973 Pontiac Firebird Oil Pickup Tubes, 1973 Pontiac Firebird Oil Pumps, and 1973 Pontiac Firebird Oil Senders.