hey i want to trouble shoot so can you help me by answering these questions. thank you. OK, which gasket are you talking about? there is no gasket on the engine block to the headers. but i think there is a gasket where the 4-2 part connects to the -1 (4-2-1 headers). so which one are you talkin about? second question, what do you mean by warped? i know what warped means but where exactly would they be warped? they're brand new and the sound was there as soon as they were installed. last question, i dont think they could of been installed wrong. its not that hard to install headers. its just remove the old one and replace with new ones. they came with 3 metal rings which act as gaskets. i just dont think its that hard to install headers. so my question is, how could they have been installed wrong?

Ok. well i just want to troubleshoot. im not denying that it might be one of the problems you said. please reply to me at your earliest convenience. thank you.