This brand-new truck air dryer comes with part numbers 1351443, 1315688 and LA8284. It is a core component of the truck pneumatic and air brake system. It effectively filters moisture, oil and dust to keep the air circuit dry and clean. It protects brake system parts from rust and failure under long-term operation. Made with premium sturdy materials and manufactured to OEM standards, it is simple to install and perfect for replacing old or faulty air dryers