So in buying an aftermarket or Mazdaspeed exhaust (CAT-back or turbo-back), will getting additional mufflers (i.e. the CPE exhaust) make any relevant performance difference? Additionally, what are drawbacks to eliminating a cat vs getting a high-flow cat? I understand there are two cats on the MZSP3. If I eliminate both of these, I understand there is a noticeable performance difference. What about sound, which brings me back to the muffler question.
If I got, for example, a CPE turbo-back, with both muffler options, but no cat anywhere in the stream, how loud would it be? Would either of those mufflers defeat the purpose of removing a cat, i.e. add restriction I was trying to avoid in the first place? In addition to noise concerns, what other things do I need to consider if planning on going cat-less?
I'm trying to keep a nice tuned sound, without having a ricer-whine, or the loud, obnoxious churtle. I like 'knowledge's set up with the CPE and high-flow cat with one 12" muffler, it sounds pretty tight. I'm new to tuning 4 cyls, so I'm looking to understand what is going to do what.
If I got, for example, a CPE turbo-back, with both muffler options, but no cat anywhere in the stream, how loud would it be? Would either of those mufflers defeat the purpose of removing a cat, i.e. add restriction I was trying to avoid in the first place? In addition to noise concerns, what other things do I need to consider if planning on going cat-less?
I'm trying to keep a nice tuned sound, without having a ricer-whine, or the loud, obnoxious churtle. I like 'knowledge's set up with the CPE and high-flow cat with one 12" muffler, it sounds pretty tight. I'm new to tuning 4 cyls, so I'm looking to understand what is going to do what.
