Yesterday during one of the funruns at an autoX, I blew a weld on my cat and now I have an exhaust leak. It is right at the end of the cat so it can not be bandaged for the time being. Since I am going to be doing a swap soon, I really dont want to buy something then have to get a new one a few months later because it will not fit with my new engine. I would like to go with a highflow, honey comb style cat. My question is will it fit with the b series or will I have to buy a new cat again? Also, what are some good brands.