As the name implies, a header-back exhaust includes new piping from the header collectors all the way to the tailpipes (in some cases, the mufflers are not included). The important piece of info here is that since header designs vary, header-back exhausts are either made for full-length headers for a specific brand or for exhaust manifold-length headers. For example, a Flowtech header-back exhaust system for full-length headers would specifically fit vehicles with Flowtech full-length headers. The Pontiac Firebird header-back exhaust systems will have this information in the description.

Pontiac Firebird Header-Back Exhaust Systems