okay so i have a 2011 RA, magnaflow catback, evo x bov, k&n filter, injen uicp. my weird story is... i was sitting in traffic on the whitestone bridge in ny a couple days ago after i went to pick up my uicp when all of a sudden the car kinda starts to bounce. like the back end jostling up and...

Hey, I recently had a used UR resonated test pipe installed. About a week or so afterward, I would notice after I drive my car on the freeway for about 10 minutes with sustained speeds of 65-70 mph, I start to hear a rattling sound. At first I thought it was the suspension, but the chatter or...