The Kenworth W900L 6 Inch Elbow Left Side is a practical and efficient solution for your truck's exhaust system. With a 6-inch to 5-inch taper-loc reduction on the top side, this elbow is designed to accept a 6-inch O.D. stack, providing a secure and reliable fit. The 40-step feature ensures a secure connection, and it is sold individually. This elbow is compatible with most Kenworth 2003 and 2006 Aerocab W900L models, making it a versatile and beneficial addition to your truck's exhaust system.