For a racer running a lower rpm engine with a MSD magneto here is a great deal. RPM rev chips will give safety and reassurance that if something goes not as planned your precious motor is protected. RBS has one of these so get them before they are gone!!!!!!!!!!! 6000-6800 rpm in two hundred rpm increments.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.