The Active Autowerke Track Pipe is comprised of TWO main components. This is the SECTION (B) which is the latter part.
If you install the Active Autowerke performance headers, but would like to run a rear exhaust like the BMW Factory; Active Autowerke GEN 3; Supersprint; Remus; or others, then you need the Active Autowerke Track Pipe SECTION (B).
The Active Autowerke SECTION (B) bolts directly to the Active Autowerke headers in an seamless operation. The terminating end of the SECTION (B) is precise and easily allows fitment of any factory like rear exhaust for the BMW E36 M3.
Active Autowerke designed the Track Pipe not as a one piece, but a two part unit with multiple functions and flexibility.