Description: This high - quality CAT fuel filter adapter is a great fit for 2001 - 2016 GMC/Chevrolet HD 2500/3500 trucks with 6.6L Duramax engines. Built in - house, it replaces the factory filter and housing with a CNC - machined, billet aluminum housing. It uses a low - cost, readily available CAT 2 - micron filter to ensure clean fuel for your powerful Duramax. Part Number: DUR - FUE - A046. Features: Precision - machined from billet aluminum for a reliable fit. Comes with necessary hardware and a filter head spacer. Its central adapter design eliminates leak paths through threads. Fuel - rated O - Rings guarantee a leak - free install. It can accept various aftermarket filters like the popular CAT 1R - 0750 (not included). The Cat 175 - 2949 fuel/water separator can also be threaded on for use as a downstream separator with an aftermarket lift pump. Notes: The CAT filter is sold separately. You need to remove the factory water in the fuel sensor, but it won't trigger any check engine light codes.

Using this Duramax CAT fuel filter adapter is straightforward. First, remove the factory filter and housing. Then, install this adapter in its place using the included hardware and filter head spacer. Make sure to use fuel - rated O - Rings for a leak - free install. You can choose the filter you like, such as the popular CAT 1R - 0750. Note that the CAT filter is sold separately. When installing, you'll need to remove the factory water in the fuel sensor, but don't worry, it won't cause any check engine light issues. For maintenance, regularly check the filter for dirt and debris. Replace the filter as needed to keep your engine running smoothly. If you want to use it as a downstream separator, you can thread on the Cat 175 - 2949 fuel/water separator with an aftermarket lift pump.