The Peterbilt 37 Series Stainless Steel Upper Coolant Tube (OEM Number 07-05723) is a durable and practical solution for your Peterbilt 37 Series 1993 and older models with Caterpillar engines. Made from 304 stainless steel, this coolant tube offers superior strength and longevity. It fits most models and is compatible with both OEM and aftermarket numbers (07-05723 and 0705723). With its reliable construction and easy installation, this coolant tube ensures efficient cooling and optimal engine performance. Upgrade your Peterbilt with this high-quality product for a seamless and hassle-free experience.