[chris15]

Within the next 3 months or so I'll be turboing my n/a PT, but am getting the ball rolling early (fuel system upgrades, oil lines, etc.) and would like to swap in a Magnaflow muffler because I've read that they make some pretty good flow-through mufflers.. so first question: could someone provide me with a model # and/or the dimensions of the mufflers you guys use? I'm not inept, and I realize that 2.25"-in/2.25"-out is required, but I'm referring to the dimensions of the muffler casing itself.

Also, so I don't have to create another thread-- in the meantime, without the turbo installed, would anyone care to explain the effects of reduced backpressure on the n/a PT? (Will I see reduced fuel mileage? Drop in low-end power? Slower throttle response?)

Thanks guys, I appreciate you all sharing your knowledge!