I was thinking about this, if i remove the stock D.P. and exhaust will I gain HP? Or do I need the backpressure? If I did remove everything would it be loud or quiet because of the turbo. I know turbo cars are quiet.

 

You wouldnt gain anything more over a 3" turbobackbut a ton of noise. The turbo applys more than enough backpressure for the engine.

 

Backpressure is a myth!!!!

 

What you will gain is a ton of heat into an area that isn't designed for it. Save your pennies and buy a proper DP or have one built. There is really no substitute for quality work.

 

You'll have more power, horrible noise, I mean HORRIBLE, and the first time you shut the engine off after a hard run and the temp is a little cold, expect to warp and exhaust valve, exhaust are put there for a reason, not just noise