whats the diff. between axle-back and cat-back..?

haha that was simple... thanks

well, full exhaust from wherever the catalytic converter is back. cat-back systems usually refer to including the b-pipe, which if anyone has checked out the dyno charts they will know that the b-pipe gives negligible hp gains unless there is major motor work or forced induction. i used the $300 bucks i saved on not buying a cat-back system and bought my headers, which give much more power then the b-pipe ever will. the numbers don't lie, my 15.9 sec pass was with wheelspin going into 3rd. (the track was REALLY cold, avs tires don't like cold ) on a good day, 15.6 is not out of the question. (note mph)