Today i jus put a 4-1 header and a resonator type high flow cat on my car. Unfortunately it did not fit properly and there is a leak between the cat and header. The car is sooo LOUD now...sounds like a damn wrx with loud ass pipes. Is this cause of the leak or this is jus how it is when you put a header and cat? I put the silencer in the n1 and it wasnt as loud but its still loud. Should i get like a dynomax muffler or something to quiet it? Can meineke weld the cat and header together? How much do you think it would be? Thanks..