Which one is better for a deeper tone? I talked to Fast Intentions yesterday and he said test pipes are louder but I don't want a nasty/raspy loud sound. I didn't ask him many questions about the difference but I thought I'd ask yall. What's yalls opinion? I like a deep tone but the setup he told me sounds pretty good. 12" res, HFC non res, 10"sport mufflers. I'm also adding the dual CAi ( All Fast Intentions) Opinions? My previous setup had carbon fiber mufflers..that's the only difference I think. Help