Whats up bro.....no check engine lights and the smell isnt really noticable. You cant really tell its cat-less till u step on it. With the windows up its silent, pull them down and step on it. U will definitely hear the turbos spool up....the way it should have came from the factory!

I'm pretty sure going catless will not pass emissions, but again u cant really smell any fumes or that rotten egg smell. My corvette was catless and smelled horrible. Sick silver x5m u got bro!