what is the limit of our stock cats?

I am in the process of getting a JWT 700BB TT kit installed on my car and am wondering if the stock cats will be able to hold up ok?

my goal is 400hp. will the stockc ats be able to flow enough?

I would like to be able to pass emissions because I may move soon but am not sure where, and also I dont want to go with test pipes due to noise and rasp.

Also I had test pipes n/a and they were way too loud but im not sure if theyll still sound bad with the turbos if i need to go that route?

 

I totally sympathise wth you. I ran berk test pipes with my 5zigen and my ears were bleeding.

Stock cats are fine. I'm running them at 430whp. Can find my build thread in the forced induction section.

 

awesome. thanks for the help! when you ran test pipes did u see huge gains though?

while searching around people are claiming 30-40 whp more with just the addition of test pipes