K & R Performance drag racing products are loved for their reliable performance and ease of use. K&R Pro-Cube Delay boxes are small yet easy to set with gloves on. They incorporate several functions in a small delay box unit by incorporating a safety transbrake lockout feature, a built-in timer that could be used for throttle stop control or nitrous and displays are backlit. K & R also offers a pump kit to replace your CO2 bottle setup as well as a throttle stop kit. JEGS has quality K & R Performance racing products ready to ship to your door at the best prices around!