OER Parts offers a wide selection of Cooling System Components for your 1983 Pontiac Firebird. OER Parts offers 1983 Pontiac Firebird Overflow System Components, 1983 Pontiac Firebird Bottles and Caps, 1983 Pontiac Firebird OE Style Radiator Overflow Jars, 1983 Pontiac Firebird Stainless Steel Radiator Overflow Tank , 1983 Pontiac Firebird Overflow Jar Bracket, 1983 Pontiac Firebird OE Style Overflow Jar Cap, 1983 Pontiac Firebird Billet Aluminum Overflow Jar Cap, and 1983 Pontiac Firebird Radiator Overflow Bottle, Hose & Cap Set.