OER Parts offers a wide selection of Cooling System Components for your 1987 Pontiac Firebird. OER Parts offers 1987 Pontiac Firebird Overflow System Components, 1987 Pontiac Firebird Bottles and Caps, 1987 Pontiac Firebird OE Style Radiator Overflow Jars, 1987 Pontiac Firebird Stainless Steel Radiator Overflow Tank , 1987 Pontiac Firebird Overflow Jar Bracket, 1987 Pontiac Firebird OE Style Overflow Jar Cap, 1987 Pontiac Firebird Billet Aluminum Overflow Jar Cap, and 1987 Pontiac Firebird Radiator Overflow Bottle, Hose & Cap Set.