hi fellas just wondering, im thinking about doing at n/a - turbo conversion (if i dont sell my car) and was wonderin if the size of the exhaust really matters, im currently running a 2.5in lukey. would you reconmend upgrading to 3inch would it make a diffrence with boostin ect....?

Less restriction the better 3" - upto 250-300rwkw 3.5" - 300-400rwkw 4" - 400+ Its a pretty generalistic number, so dont take it as gospel. I did run 350rwkw with a 3", but it was choking a bit. Going from a 2.5 to a 3 on a stockish setup you will notice a difference indeed. It might not be a lot, but if you run a bit more boost later, it will hurt more and more etc.

how about a 2.5" exhaust? as i dont wanna get rid of mine on a stock high comp turbo system

will work, but wont be the best, and or cuorse most 3 inch systems are mandrel bent. so alot better flow over a 2.5 press bent exhaust..

4in lol holy sh*t thats abit of an over kill isnt it?

Quote: Originally Posted by azzaturbo 4in lol holy sh*t thats abit of an over kill isnt it? lol. We have to keep up with ricers some how! We have to have the bigger and better toys lol. 3" dump to 2.5" would be sufficient for a stock high comp setup no?

depends, i intend to make 300kw. so im not gonna try, but then again im getting a full 3 inch mandrel bent in stainless for about 400 Some original photos have not been recovered yet.

haha im buying the 3" dumpy off paul so yer mite as well take the 3"

so wat size ppl usually go these days so i know

3" mandrel bent is the go