Forgive me if these are becoming ridiculous. For an FI car, would a dual exhaust (from the cat-back) be helpful? At worst, would it cause any degradation of the car's power output? Would a cutout restricting flow into the added pipe where it is not under boost be a good idea? I realize that dual systems have been done before and know some of the perils (the body isn't made for a dual exhaust system, and nor is the rear bumper, etc.) I'm just curious if as an option this is outright silly.

 

the more flow on a FI car the better nomatter what....and i have 3" to the rear axle then it splits

 

ill agree with that. whenever u have FI, its difficult to LACK backpressure since ur boosting but obviously if ur running 4" straight through...LOL... for any FI car, id stick to 3" generally

 

dual exhaust would be great.

 

I think it wouold look good and you would be quite happy with it. I doubt you would see any negative hp loss since it is after the cat