Hey guys im looking to make an exhaust next week what sizes is everyone running to make around 300hp. Right now i have a dezod s1 (turbonetics t3/t4 .63 trim) Kit.

I dont know whether to go 2.5 or 3...right now i have a skunk 2 s pipe back which is 60mm (about 2.36in) and i beleive that is holding me back...

 

this question has been beat to death man. search for your answer bro.

 

^^^ i agree. Im runnin the tsudo s2 70mm and its pretty good. Erz has em for 300 shipped.

 

Go big or go home. 5" exhaust.

 

Thanks bud just wanted to know what u gurus were running

 

just dump it and run no exhaust

 

yes it can be done but a 3in would help spool faster and make better power easier.

 

3" is what your looking for.

 

Im joking. 3" is what you want.

 

3" will be the most efficient, and what I would recommend. Can you make 300whp on 2.5"? yeah definitely - Ive made 400whp on 2.5", but 3" will be MUCH more efficient when you start getting into that range.

 

3 inch is what im running noticed a slight diffrence in spool time from 2.5 to 3.0

 

Thanks the reason i was wondering was i think that my dump and s pipe is 2.5 i think im gonna start by making a 3 from s pipe back and then go to a full three next year..

 

Im really thinking about talking my Dad into making me an exhaust at his shop. Does any one know where you can find some Flanges for good prices? Engine Manifold flange also.

 

treadstone performance or dezod

 

i was in 300whp with a custom 3" exhaust is perfect for it dont get a larger size

 

i have a small t3/t4 .50 trim with a 2.5 inch crushbent exhaust, i was tuned at ptuning for 10-11 psi car made 280hp there, i have since put in a 13psi spring and then got dynoed at a local shop the attached dyno is the results also people cannot say that the dyno doesnt read like ptunings because i raised the boost 2 psi and the en result was 20 hp which goes with the general rule of thumbs for every 1 psi of boost you raise you increase 10hp. now had i had a 3inch exhaust these numbers would have came at maybe 10 psi

 

I know you're being an ___, but I myself am seriously contemplating doing this.

 

cut a hole in the hood and stright out the top and then when you blow a flame out the top from rev limter or 2 step you look like a genuine bad a$$

 

Im thinking about doing that with my DP actually.

 

The result was 20hp on another dyno. You can't compare that way, needs to be on the same dyno. Different for different cars in the amount of power it's going to make per psi.