The Roadworks 6 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 a 6 inch diameter reduced to 5 inches, it fits most Peterbilt 379 and 389 glider trucks. This product is sold individually, making it convenient for your specific needs. Improve the performance and efficiency of your truck with this durable and versatile exhaust elbow.