SLP Performance X-Pipes are an Excellent complement to their "Powerflo" Systems. They're built using Free-flowing, Mandrel-bent Stainless-steel Tubing and have a True X-type Crossover that provides a Significant Horsepower increase over the Restrictive Stock Exhaust System. SLP gave them a Three-piece Design for Versatility and Easy installation; and you can get them with or without High-flow Catalytic Converters, Depending on your needs.