It started out as a na and i went with the boostlogic na-t kit, aemems stand alone computer. It has a 5 speed in it rite now but have a 6speed to swap in to it one of these days. The 5speed is holding well for now as it only make 400 to the wheels on a rich tune. The set up is good for 500 with a new tune but my poor 5speed will break.