Hi guys, i have a question for those of you who know about exhaust systems. I bought a Magnaflow cat back for my 04 N/A and after a while i took it out because the noise was getting too much into the car. I like the sound though but i would like it to be just a little lower. My car has 2 of 4 catalyst removed and the NW Dual Intake. I would like to know about what mods could help me lower the noise produced by the catback because i would like to put it back on.

Thanks in advance