I just started it up in my garage. I reved it to about 6000rpm and there was no rattle noise in netural. Another thing is i can drive around the block and it not happen, it only happens past 3000rpm when the turbos arnt really boosting, so if i hold 2nd flat i dont hear it really, if i gradually bring the revs up while moving in 2nd then i can start to hear it (same with 1st gear etc..)