My exhaust started to get louder and louder and then i started to hear exhaust leak sound. I got scared i thought maybe i hit something hard and messed up nice Cobb exahust. After inspecting it turned out to be exhaust gasket. Cobb makes very good product but i wish they would give better exhaust gasket. I just end up getting ordering new gasket from Summit Racing for only $4.50 with steel ring.