I got a set of the hmd520 Eliminator exhaust and im wondering if I should put it on my 2010 crossroads. does an exhaust like that do anything for power? im planning cams and PCV next winter if not sooner. I currently have atom bombs on the stock headpipes. if I don't go with the hmd I would like to increase the left side muffler inlet and make my own 2 into 1.