Just got my Full race stage 3 turbo kit in. I'll be combining that with the thermal turbo exhaust. Will I still need a cat? Not sure if the down pipe goes all the way back to the exhaust or just the cat. If I still need a cat, anyone know of a good one? How about test pipe? Which of the two would you prefer? I also want to know if anyone has combined a test pipe with the thermal exhaust. How much change should be expected in the tone of the exhaust. thanks.

 

get a test pipe. a cat has restriction. u dont want that for turbo.

 

My Full Race stage 3 with AC downpipe didn't quite reach my thermal and it was a bit off center. We had to make a 10 inch pipe that was slightly S shaped to link the two together. Sounds great under boost.

 

you think the downpipe being off was just your car or you think im gonna have that problem also?

 

You would need to contact Full-Race about that. It is possible that my downpipe was a little off and a little short. It really wasn't a big deal to get a custom 3" pipe made with flanges. We even put in two extra O2 sensor ports in it, one for my PLX wideband and the other for the tuner's wideband. I use the O2 port on the downpipe for the stock narrowband O2. Don't sweat it, if you find it is a little short just call your local exhaust shop and see if they can fab something up.

 

I would imagine there would be a gap between the end of the DP and where a catback exhuast would goto. So long as your state doesn't have any sort of "sniffer" emissions test and you can pass inspection w/o a cat, I would reccomend a test pipe. You could buy one somewhere online or goto probibly any muffler shop that does domestic work as they'll prolly have some 3" straights for you.