Originally Posted by Leroydsouza

I really do wish you good luck.
I had an akrapovic and got the ART pipes shortly after.
It was the worst thing i have ever heard. I am pretty sure people around me thought it was a Honda

I sold it all in under a weeks time. If i have been explained right, The exhausts are the one that has a major factor in rattle/sound.
Some exhausts dont have 'rattle' (I understand what you have, Its not rasp, Its something much worse. I had it)

I wish you good luck really, But be prepared to put down money for another exhaust or not use Test pipes