The Roadworks 8 Inch Reduced To 5 90 Degree Long Drop Exhaust Elbow is a practical and reliable solution for your truck's exhaust system. Made of chrome plated steel, this exhaust elbow is built to last. With an 8 inch diameter reduced to 5 inches, it fits most Peterbilt 379 and 389 glider trucks. This product is sold individually, making it a convenient choice for truck owners. Improve the performance and efficiency of your truck's exhaust system with this durable and versatile exhaust elbow.