I really don't get it, how can something rattle unless is not properly bolted? Nothing inside the Invidia test pipes to make it rattle. Are they touching the body when vibrating?
Test pipes and HFC stock and prices for this week:
2 x 350z Invidia 60mm High Flow Cat - £459
5 x 350z Invidia 50mm Test pipes - £179
5 x 370z Invidia High Flow Cats - £459