Couple questions before ordering my exhaust.

[boostedAvant]

Okay so I know I want 3" turbo back using thermal universal mufflers and a muffler in the middle as my "resonator" my question is should I get 12" or 16" mufflers they are 8" oval with a 3" inlet. My other question is regarding the center muffler should it be oval or round? What sound difference is there between the two? They make the 7" round in 13" and 16" lengths. Thanks ahead of time,

Jace.

[heateris]

why not buy a complete system from a tuner? IE - AWE, APR, Neuspeed, etc?

[boostedAvant]

Money, then I'd have to buy a test pipe afterwards might as well just do all at once, also I want 3" all the way.