Lincoln Chrome brand top stack has a show-quality shine. Bright nickel chrome plating and hand-polished for a flawless, durable finish. The turn-out top directs exhaust away from trailer and also reduces rain water build-up. They are 100% American made of cold rolled, aluminum killed carbon steel. Plain end bottom. Manufacturer warranty against product defects in workmanship and materials for one year from date of purchase. Clamps required (not included). Made in the USA.