The Kenworth W900L 7 Inch Elbow Left Side is a practical and efficient solution for your truck's exhaust system. With a 7-inch to 5-inch taper-loc reduction on the top side, this elbow is designed to accept a 7-inch O.D. stack, providing a secure and reliable fit. It features a 45-step and fits most Kenworth 2003, 2006 Aerocab W900L models. This durable and high-quality elbow is sold individually and is a perfect fit for your truck's exhaust system needs. Check OEM number M66-1271CP for compatibility.