Originally Posted by Jordo!

Do you mean the cats?

You can pick up a set of used resonated TP's from someone, and that should eliminate the rasp and 95% of the hiss on coast down anyway.

The Y pipe will probably hiss no matter what you do... I went from a wider one back to S-tune (ever so slightly wider than OEM) because I couldn't stand the hiss.

Good luck... hopefully you will either get used to it, or find a combo that works.