My dad is having me order some new rotors for his Suburban. They warped from towing his boat, so i am going to order him some Power Slot. As i was seaching on truckperformances website i noticed that they had some lowering coils from Ground Force for our trucks, was wondering if these are any good, they are only 98 bucks, i figured if i was going to put the rotors on his truck he could get me the coils , are these worth the money or is it going to ride like crap, they only lower it an inch. Anyone have them, could i get some feed back.