Hi, Im new to this site. I heard that I can go to a place to get a customed & wider piping to replace my entire exhaust system. I heard that every bend takes away 2-5 HP! So would you all recommend me getting a 3 inch wide straight piping for a single exhaust? I would throw on an Apexi muffler. Also, would I gain or lose HP if I converted my S2K from a dual to a single exhaust in this way?

 

if you can get someone to make you a mandrel bent 3 inch exhaust system then go for it. You will see good gains but only if you have a test pipe to go with it or else you'll probably end up loosing power.
single would be better due to less weight, and it will yield better results as far as gains go.

 

You don't need a 3" exhaust for a NA car, that is way too big and will be ungodly loud. A few bends won't hurt anything, just don't have it doing currly-Q's.

 

T1R 70MM header back exhaust system...

 

explain why it's to big. a 3 inch will show better gains then a 2.75inch(70mm) would. It's actually not loud either. It's etremely quiet considering mine is almost completely straight through with a test pipe, and yet there is minimal droning. It's just a deep tone outside, and sounds amazing. An invidia is still much louder.

 

most people use 3'' for FI cars

 

Get a Fujitsobo.!!!

 

The exhaust that you are describing sounds like the one Cody offers. Check out the GB for the Lovefab 3" single with an Apexi muffler. It is just about as straight of a single as you can get, but I would only suggest it if your car is turbo or SC'd.

 

If you don't belive me, just cut straight to it and buy a 5" kit made for a Cummins diesel.

 

because with n/a you need some backpressure otherwise you will lose power with too big of a size of an exhaust....someone correct me if I'm wrong......