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My car was sounding like it was a diesel, so I braised the stock header (its an LX) and now it sounds completely normal.... However, when I start the car up in the morning my exhaust pipe rattles really bad (only when the car is cold). I checked all the nuts and bolts and they are as tight as they can go.. Anyone got any ideas? And why is this happening only when the car is cold? This problem is driving me so crazy I had to up my Zoloft to 100 mgs.