XDP has the FASS BFC1001K Billet Filter Cap Kit that will replace the missing or broken cap on your 2017-2024 GM 6.6L Duramax L5P. The factory plastic fuel filter cap on your L5P Duramax is prone to rounding off when replacing the water separator and cracking during extremely cold weather conditions. Upgrade your stock plastic fuel filter housing or FASS Drop-In Series with this Billet Fuel Filter Cap! The Billet Fuel Filter Cap was designed and manufactured in the USA with the quality you'd expect from FASS. This cap utilizes the same 36mm socket for removal and is equipped with a billet aluminum drain valve that allows for tool-free draining. Machined in the USA out of 6061 billet aluminum, this filter cap is a must-have for your Duramax.
Features:
- Billet Drain Valve Allows For Easy Draining
- Works With Factory Plastic Fuel Filter Housing & FASS L5P Drop-In Series Systems
- 1/8" Female NPT Port On Billet Drain Valve Allows For Barb Fitting To Be Installed
- Replaces Cheap OEM Plastic Fuel Filter Cap With A High-Quality 6061 Billet Aluminum Cap