The Grand Rock 2 Position Diverter Box is a practical and efficient solution for redirecting heat. With 5-inch I.D holes and a 7-inch by 7-inch box, this 2-position heat diverter box fits most makes and models prior to 2007. It is not approved for use on 2007 and later emission engines. Designed for convenience, this diverter box is sold individually and offers easy installation. Improve the functionality of your vehicle with this reliable and versatile product.