Improved exhaust with no change in sound

[wingnut]

First off, I'm a noob when talking about exhaust. All I really need to know is that increased flow out = better performance. I have a 1.4 with the MT. It is trifecta tuned. I would like to improve upon the stock exhaust, but I have no desire to make it louder, or deeper in any fashion. Any suggestions as to what exhaust system which would give me that slight performance hit I desire without changing the exhaust note significantly? Thanks in advance for any input.

 

[rdss]

You're not going to get one without the other, you can significantly reduce the noise. Get the ZZP turbo back with a high flow cat and muffler and then have an 18" Magnaflow resonator welded into the mid pipe.

6x18":
http://m.magnaflow.com/02product/shopexd.asp?zone=main&id=11070

4x22" if you have the room:
http://m.magnaflow.com/02product/shopexd.asp?zone=main&id=10962

I had an SLP with a Magnaflow muffler swapped in the rear and with no cats it sounded great. Not to quite but absolutely no drone or offensive sounds at any engine speed.