Yeah, I have raspiness with my setup. The metallic hiss/rattle mostly happens on acceleration though and not really decel. The sound is reallly bad during the first several minutes of driving after start up, then it dies down a bit after it gets warmed up, but you can still hear it sometimes. Some exhausts just arent meant to be mated with TPs or HFCs I guess.
Edit: My setup is with the new Invidia Gemini btw.
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