Today My nephew and I were leaving work on a road behind our plant that has absolutely no traffic. As we turned down the street we both rolled on the throttles and I rolled a second faster and then, he just pulled from me really strong. I have an 09 RS stock with Cobra slip ons. He has an 09 Night train with Screamin Eagle pipes, Screamin Eagle air induction and it has been re mapped. I knew he would take me I was just shocked at how he pulled me. Is this normal???