Hey guys
I think there are a few other guys in the same situation as me.
My car came with a 3" HKS cat back system from Japan (it's really really quiet, I kinda want something louder). I have also had a hi flow cat and 2.75" front pipes fitted to the car.
I'm now planning ahead to future mods. I currently have -9s and am planning to put 20psi through them with e85. This obviously means over 300rwkw...
From what I've read, people highly recommend getting a bigger exhaust for anything over 300kw.
But since I've already got a full 3", I wanted to know what kind of gains I would expect to see if i upgrade my whole exhaust to a 3.5 or 4 inch system.
If its something like 20rwkw then I suppose its worth the expense.
But then again I have no idea how much a 4" system costs and where I would find one. I'm expecting them to be around $2000 (dont need a titanium or anything too fancy).
So can people please shed some light on this based on prior experiences.
- Did you upgrade from a 3" to something bigger? If so, what kind of gains did you see?
- Do I need a 3.5 or 4 inch system for -9s with e85?
- Where can I get such an exhaust (online, Just Jap, custom???)
Cheers
Umair