Is there such thing as a 100% street legal after-market turboback exhaust?

 

No

 

+1. No. It is a Federal offense to tamper with your stock cat.

You can do a downpipe and cat-back without being illegal in some places.

 

warrtalon, would you still see significant gains?

 

you should see gains. cant cops tell if the cat is messed with?

 

Significan't? Eh, decent, but not great, especially not for the money spent. A downpipe with the stock cat really does nothing. The cat-back will give 10-15whp, but it's the most expensive part of the exhaust.

Mike, what do you mean? Cops don't know anything about your cat unless they see a straight pipe and know that there is no cat whatsoever.

 

well yeah...i knew there had to be something they could notice. i just wasnt sure wut it was exactly..lol..

 

As long as they see a cat under your car, you're pretty much good to go.