ok, im confused. assuming i have the JDM header and the SMSP carsound cat for my 94 gsr, what the heck is the b-pipe.. i kno where the a-pipe is, but where is the p-pipe? is that prior to the catback part of the exhaust system or what? i assume its after the cat, so...am i correct in thinking its just the rest of the exhaust system?

 

The b-pipe is the section between the cat and the axleback (muffler).

 

some people also call it the "mid-pipe"