Throttle body gaskets can deteriorate and dry out over time and cause air or coolant leaks causing drive ability issues. They should be replaced every time the throttle body has undergone any replacement, repair or service. All throttle body gaskets should be changed when you suspect or there is evidence of a leak. BBK Performance throttle body gaskets are made from high quality gasket materials to last and for the most part are a relatively simple installation These Premium Quality Gasket Sets are the same ones included with all of our Power plus series throttle bodies and can be used for most stock and aftermarket installations. Available for most popular late model EFI applications including Mustang, Camaro, Firebird, Corvette, Ford F Series and GM truck as well as many Jeep and Import applications. THROTTLE BODY GASKET KIT FOR GM TWIN 52MM THROTTLE BODY 1534-1537-1540-1543. Chevrolet: Camaro 85 - 97 Base / Berlinetta / Indianapolis 500 Pace Car / Iroc-Z / LT / RS / RS Heritage Edition / Sport / Z28 / Z28 Heritage Edition, Chevrolet: Corvette 89 - 96 40th Anniversary Edition / Base / Collector's Edition / Grand Sport / Indianapolis 500 Pace Car / ZR-1, Chevrolet: Impala 94 - 96 SS, Pontiac: Firebird 85 - 97 Base / Formula / S/E / Trans Am / Trans Am GT / Trans Am GTA