OER Parts offers a wide selection of Cooling System Components for your 1985 Pontiac Firebird. OER Parts offers 1985 Pontiac Firebird Overflow System Components, 1985 Pontiac Firebird Bottles and Caps, 1985 Pontiac Firebird OE Style Radiator Overflow Jars, 1985 Pontiac Firebird Stainless Steel Radiator Overflow Tank , 1985 Pontiac Firebird Overflow Jar Bracket, 1985 Pontiac Firebird OE Style Overflow Jar Cap, 1985 Pontiac Firebird Billet Aluminum Overflow Jar Cap, and 1985 Pontiac Firebird Radiator Overflow Bottle, Hose & Cap Set.