ok I called dynoport about mine too and got the same response from them. Here is what I did, first of all I put some high temp sealant arounf the exhauist port holes and let it dry overnite, voila", no more exhaust leak. Second of all, in chicago here I run 2 sizes up on the main and readjusted the airscrews. Im running a proflow foam filter with the snorkle off. Runs like a top!!