This exhaust system is great for those who drive in extreme conditions or just want to boost their vehicle's performance. Whether you're on a long road trip or taking your car to the track, this exhaust will perform. It's designed for Ford Explorer and Lincoln Aviator owners who want a reliable and high - quality upgrade. The tubing is 2.5 inches in diameter and is made of T304 stainless steel, which is durable and easy to clean.