I want to keep a stock appearance and I plan on upgrading to a full 3" exhaust and either a Big 16G or a Green (If i become rich) Turbo. My question is, will a 3" in, dual 2.5" out (equivelent to a 3.5" tip) Magnaflow muffler flow enough air or will I have to go with an N1? What kind of performance differences can I expect? Any predictions of sound quality? If you can provide any info, that's great. I've asked this question a # of times here, but I've yet to get a response. Thanks.