Got my 18" Magnalfow, Y-pipe, and 85mm throttle body. Installed everything over the last day or so, very happy with the performance and sound. Ultra fast shipping, and great customer service. Traction control struggled to keep up. Now just waiting on the backordered catch can. Would probably get a little better gas mileage if I could stay off the skinny pedal. Loving my "new" truck.