The Walker Exhaust Hanger 822W (35148) is a rubber hanger used to support the exhaust system and reduce vibrations and noise. "NOS" stands for "New Old Stock," which means the product is new and unused but has been sitting in storage for some time.

If you are purchasing a lot of 3 of these hangers, it's important to ensure they are the correct fit for your specific make and model of vehicle. The Walker Exhaust Hanger 822W (35148) is designed to fit a wide range of vehicles, but it's still essential to confirm that it's compatible with your exhaust system.

When installing the hangers, be sure to follow the manufacturer's instructions carefully to ensure proper installation and to avoid damaging the exhaust system or the vehicle. It's also a good idea to inspect the exhaust system regularly and replace any worn or damaged hangers to ensure the system continues to function properly and to prevent damage to other parts of the vehicle.