The Grand Rock 4 Inch I.D/O.D or O.D/O.D Diameter 15 Degree Elbow Pipe is a durable and versatile exhaust component. Made of aluminized steel, it is available in 4 Inch ID/OD or OD/OD options, with 4 inches in length on each side and a 4.5-inch centerline radius. Sold individually, this elbow pipe fits most makes and models, making it a practical and convenient choice for exhaust system repairs and upgrades. Its high-quality construction and universal fit make it a reliable and cost-effective solution for a variety of vehicle applications.