This MBRP exhaust system is perfect for Ford Focus ST owners from 2013 to 2018 who want to enhance their vehicle's performance and sound. Whether you're cruising on the highway or taking your car to the track, this exhaust system will make your driving experience more exciting. It's great for people living in dry areas as the Aluminized Steel tubing is resistant to damage from debris. The tubing is 3 inches in diameter and is mandrel - bent to ensure smooth exhaust flow, giving your engine more power and improving its longevity.