FASS Fuel Systems Billet L5P 2017-2024 Duramax Fuel Filter Cap (BFC1001K). Part No: BFC1001K The OEM plastic fuel filter cap on your L5P Duramax is susceptible to rounding off when replacing the water separator and cracking during extreme cold weather conditions.
Upgrade your OEM plastic fuel filter housing or FASS Drop-In Series with our Billet Fuel Filter Cap! The FASS Fuel Systems Billet Fuel Filter Cap was engineered and manufactured in the USA with the quality you'd expect from FASS.
Our Billet L5P Duramax Fuel Filter Cap utilizes the same 36mm socket for removal and is equipped with a billet aluminum drain valve that allows for tool-free draining! The FASS Fuel Systems Billet Fuel Filter Cap was engineered and machined in the USA out of 6061 billet aluminum. L5P Duramax Billet Fuel Filter Cap

Replaces the cheap OEM plastic fuel filter cap with a high-quality 6061 billet aluminum cap
Billet drain valve allows for easy draining
Works with the factory plastic fuel filter housing and the FASS L5P Drop-In Series Systems
1/8 female NPT port on the billet drain valve allows for a barb fitting to be installed if desired