After completing the install of my Bassani X pipe and Magnaflow Magnapacks I checked for leaks and found two on both sides where the packs slip onto the pipes leading from the x pipe. Tightened down the clamps some more and rechecked. After about 4 hours of ****ing around with it I finally found that the Magnapacks were leaking from the back, where the pipe is pressed into the muffler. To fix it got some muffler putty and smeared it on both packs and it seems to have worked. dont know how long this will last though. I am very p*&$ed and want to know if anyone else has had this problem?