[Mdawood]

this has been discussed previously. first, i think you need to re-install your exhaust. second, check the rubber hangers. someone, i cant recall who at the moment, contacted akra and got different rubber hangers and the problem was fixed.
try re-installing your exhaust-with the slek diffuser on first. if that doesnt work, i would suggest calling akra about different rubber hangers.
hope this helps
( i have the revo diffuser with full akra exhaust and titanium tips.)