4500HD, , This IST won't be on the lot long! It comes equipped with all the standard amenities for your driving enjoyment. Our sales reps are extremely helpful knowledgeable. We'd be happy to answer any questions that you may have. Please don't hesitate to give us a call., This IST won't be on the lot long! It comes equipped with all the standard amenities for your driving enjoyment. Our sales reps are extremely helpful knowledgeable. We'd be happy to answer any questions that you may have. Please don't hesitate to give us a call.