dont get a tsais, its garbage. I know a guy that had one and you might as well not even run an exhaust because it was just as loud. Didnt give any performance gains except take away a lot of it. Lasted a couple tanks before it finally broke because it couldnt handle the car crashing.

And I have to completly disagree with the above statements. My THS pipe has improved performance no matter what engine I put in my revo. It just made everything come to life. Slightly lowered temps compared to stock (5-10 degree's), gave lots of low end power without sacrificing the top end. Great mid range. Heck ask anybody that saw my revo in its prime and just how my 3.3 just had gobs of power and never seemed to run out. Id recommend getting a new THS pipe if you feel yours is worn out.