I got my Gardner Exhaust installed which is an exact replication of the factory HO exhaust. Fit and finish was excellent.
1967-1968 Firebird 400 H.O. Exhaust System consisted of 2 1/4″ head pipes, tail pipes and 2 1/4″ over the axle pipes. The system used two resonators and one transverse muffler. Our reproductions systems come with the correct size head pipes with correct flats correct over the axle pipes and correct tail pipes with correct oval shaped angle cut.
The kit will also include correct two hole front hangers, GM style clamps, correct size resonators and muffler all correct attaching hardware, correct flanges, installation instructions diagrams and sealant. Hand built hangers are available for the purist as well as a concours package for all who would like to prevent rust.