I was looking at getting a new exhaust and found a couple that sound pretty good. Ultimate Racing has a 2.5 and a 3 inch set with the stock looking oval tips and then there is the Comptech. I was just wondering if your running N/A and don't plan on going FI, is there any reason for the 3"? Also, was looking for some opinions on the sound diff between the two set ups. Thanks.

 

Is this for track or autocross?

 

I was thinking about doing a little autox in it so I know I can't do anything forward of the cat. So that brings up another question, is there anything out there that I can bolt on to my stock system from the cat back? Is the stock system 2.5"? Thanks.

 

there is also 2.75" exhausts

 

I'm a little confused with this one... why can't you?

 

If I read the rules correctly, to remain in the stock class, you can't mod anything forwrd of the cat. I may be wrong, but that's what I've read. Thanks.

 

Oh alright... it has something to due with rules. I was thinking that it's just bad in general to mod anything forward the cat. I got the wrong perception of what you were saying. Thanks for asking though...

Thanks,
Andre

 

I meant... thanks for answering (not asking)... lol.

 

3" exhaust is mainly used on turbo cars. I'd go with 2.5" if you're NA.

 

A single 2.5" is more then adequate for a NA car.