PERFORMANCE EXHAUST MANIFOLD GASKET SET 1991-pontiac-firebird-esi6483971 The system uses the factory

The system uses the factory hangers and are finished off with quad 3

s AA043 Lower A-arms are equipped with greasable

an H-pipe to equalize the exhaust pressures and a pair of specially selected 40 Series Delta Flow performance mufflers for a deep powerful sound

The throttle body flange points down on a 12 Deg angle

The American Thunder® systems deliver a moderate to aggressive interior and exterior tone and are best suited to the enthusiast who wants their performance to be heard

PERFORMANCE EXHAUST MANIFOLD GASKET SET 1991-pontiac-firebird-esi6483971 The system uses the factoryFel Pro Performance Gaskets deliver reliable sealing under grueling racing conditions