Not much dresses up a semi quite like big brilliant chrome semi truck stacks! These stacks are show quality with bright nickel chrome plating and hand-polished for a flawless and durable finish. They are 100% American made of cold rolled, Aluminum killed Carbon steel. Manufacturer warranty against product defects in workmanship and materials for one (1) year from date of purchase. The turn-out top directs exhaust away from trailer and also reduces rain water build-up. Turn-out top, 5" diameter stack with plain end bottom x 14" long. Clamps required (not included).