Use this exhaust system when you're driving your 2008 - 2012 Ford F - 250 or F - 350 Super Duty. It's great for those who live in dry areas and want a durable exhaust on a budget, as well as anyone looking to boost their vehicle's performance and sound. The tubing is 3 inches in diameter and made of heavy - gauge aluminized steel, which is tough enough to handle debris under your vehicle.