The Peterbilt 387 Stainless Steel Lower Coolant Tube is a durable and practical solution for Peterbilt 387 models with Caterpillar C15 and ACERT engines. Made from 304 stainless steel, this coolant tube is built to last. It fits seamlessly into your vehicle's cooling system, providing reliable performance. With its OEM and aftermarket numbers, F66-6230 and F666230, this coolant tube is a perfect replacement for your worn-out or damaged part. Invest in this high-quality product to ensure the longevity and efficiency of your Peterbilt 387.