Use this exhaust system when you're cruising on the highway or looking to boost your truck's power during off - road adventures. It's ideal for Ford F150 owners from 2004 - 2008 who want a cost - effective way to enhance their vehicle's performance and sound. The exhaust is made of heavy - gauge Aluminized Steel tubing which is mandrel bent for smooth flow, and it has a dual split - side design that fits specific models of the Ford F150.