Originally Posted by GaRn

well an update.. I think the leak is gone.. I took the A pipe off and checked for carbon trails from a leak, found none so i put it back on and torqued it higher than recommended and no sound now hehe.. It at the least got rid of the power drop after 5500 rpms..(h23 sucks yea i know), so it pulls good to redline now.. atleast better.. and a power increase everywhere above 3k.. I will have to take it back to the track to see!