Whatcha all got for exhaust? I know stock is 2" like on the regular P/UP. I want the 40 series Flowmaster, I've always liked the sound. Should I get 2 1/4" or 2 1/2" piping for a single out exhaust? I have the K&N Gen 2 intake already, and that was noticable. I want good HP increase, but I don't want to lose alot of TQ. I know the bigger the piping, the less backpressure, and the more bottom end power you lose. So what should I get? The smaller 2.25" pipe or 2.5" pipe single out?