This high - quality billet fuel filter housing from H&S is a great upgrade for your 2017+ GMC/Chevrolet with a 6.6L Duramax engine. Replace the weak OEM plastic housing with this solid billet one. It has an O - ring size of.25' I.D. x.065' thick, offers easy installation, and is a direct replacement. Part Number: 134001. The fuel drain plug o - rings are reusable and only need replacement when necessary.

Using this fuel filter housing is easy. First, locate the old OEM plastic housing on your 2017+ GMC/Chevrolet with a 6.6L Duramax engine. Then, carefully remove the old housing. Next, install the new billet fuel filter housing in its place. It's a direct replacement, so it should fit right in. When it comes to maintenance, check the O - ring regularly. The fuel drain plug o - rings are reusable. You don't need to replace them every time you remove the drain plug. Only replace them when they show signs of wear or damage.