exhaust mazdaspeed or catback
 

ok what exhaust is better or are both the same what one should i go with????

make your own!

from monster pro5 with 440hp

Cat-back is better than just the muffler section, because you get the larger resonator and S-pipe instead of just a higher flowing muffler.

A cat back system.....do your homework, make a choice, lay down the green, bolt it on.....and go.