I'm plopping the Kazuma exhaust on my Celica tomorrow, but I got a question. Should I just install it from the cat back or should I remove the cat and run it directly from the manifold? The West Covina Toyota guy told me removing the cat and running true straight pipe would yield better power (and yes I know its illegal and I know its gonna be ear bleeding loud). I just want to make sure if that's true or not. I might just install it from the catalytic converted on back but I just wanted some opinions. I'll, uh, post pictures tomorrow after it gets installed and all... that is assuming my eardrums don't spontaniously combust after trying to drive home with it on. Here's hoping I don't go deaf or somethin'.