The Peterbilt 386 Stainless Steel Lower Coolant Tube is a durable and reliable product designed for Peterbilt 386 models with Caterpillar C13 and ACERT engines. Made from high-quality 304 stainless steel, this coolant tube offers superior strength and longevity. It is a practical solution for maintaining optimal engine performance and preventing coolant leaks. With its OEM and aftermarket numbers, F66-6345 and F666345, this coolant tube is a perfect fit for your Peterbilt 386. Invest in this product to ensure the smooth operation of your vehicle.