At the club in my area, the owner decided to allow the Trinity Punisher which is not ROAR approved, it's a cheap stock spec motor that costs half as much as most "team edition" motors and goes just as fast, if not faster than most "team motors" that are not available to the public. This helped level the playing field and reduce costs for spec racing. Fortunately, the turf track in my area is technical enough that the lap times between stock and mod are comparable enough that driver skill trumps motor in most cases.