The Peterbilt 386 Replacement Heat Shield is a practical solution for protecting your vehicle from hot exhaust heat. This heat shield bolts onto the exhaust pipe part # M66-6701 and fits the 386 Day Cab with a single exhaust on the RT side MX motor, with a stack behind the cab. Sold individually, this heat shield is a must-have for anyone looking to protect their vehicle from the damaging effects of hot exhaust heat. Its easy installation and durable construction make it a reliable and practical choice for any driver.