hello, i'm planning on having these mods on my 06 RSX-S: cai, header, k-pro, RBC intake manifold, hondata IMG and RDX fuel injectors. I was wondering if i should either go with 2.36" or 2.5" piping for my exhaust. do you guys think 2.5 would lose to much back pressure? im kind of more towards favoring the low to midrange power but i'm afraid 2.36 would be too restrictive. What do you guys think? also does anyone know an estimate of how much power those mods would give me? Thank you in advance

 

Isn't the S exhaust already around 2.25 to 2.5? 2.36 wouldnt really net a gain, 2.5 is probably good enough for a car thats not boosting.

 

You won't be losing too much back pressure with the 2.5".

 

I agree,

you can also look into 3 inch piping, but you will need to get tuned for sure.

the backpressure BS is all a myth.