I will do a datalog today and what about Corsa exhaust? I couldn't find anything about the Corsa exhaust and have a feeling it is only a cat back. I have a strong feeling for the Borla mufflers making more low end torque than others with no drone. I need to source exhaust pipes that are not $800. first. Then I need to have them hacked and the PYPES Cats welded in to start.