Description
Overview
The FASS Fuel Systems Billet L5P 2017-2024 Duramax Fuel Filter Cap (BFC1001K) is a direct upgrade for the fragile OEM plastic fuel filter cap found on the L5P Duramax fuel filter housing. Machined in the USA from 6061 billet aluminum, this cap is engineered to eliminate the rounding-off and cracking problems that plague the factory plastic cap during routine fuel filter replacement and in extreme cold weather. If you’ve ever had a plastic cap strip out or split during a fuel filter change, this billet cap is built to put that headache behind you.
Built for Real-World Fuel Filter Changes
Changing fuel filters on a diesel truck shouldn’t mean fighting a cheap plastic cap that rounds off the socket or snaps under torque. The BFC1001K uses the same 36mm socket size as the factory cap, so there’s no learning curve or special tooling required when it’s time for a fuel filter diesel change. Beyond the housing cap itself, the billet aluminum drain valve is a standout feature — it allows for tool-free draining of the water separator, streamlining maintenance and helping keep the overall fuel filter change cost down by reducing time spent under the hood and the risk of damaging the housing.
The drain valve also includes a 1/8 female NPT port, giving you the option to install a barb fitting if you want a hose routed to a drain pan or catch container. It’s a small detail that makes ongoing maintenance on your fuel system noticeably more convenient.
Compatibility
This billet cap is designed to work with both the factory plastic fuel filter housing and the FASS L5P Drop-In Series Systems, so whether you’re running the stock configuration or have already upgraded to a FASS drop-in system, this cap bolts right in as a durable replacement part. It fits Truck/SUV applications equipped with the L5P Duramax platform (2017-2024), and is sold as each.
Key Highlights
- Machined in the USA from 6061 billet aluminum for long-term durability
- Replaces the OEM plastic fuel filter cap prone to rounding and cold-weather cracking
- Uses the same 36mm socket as the factory cap — no special tools needed
- Billet aluminum drain valve enables tool-free draining during fuel filter changes
- 1/8 female NPT port on the drain valve accepts an optional barb fitting
- Compatible with the factory plastic housing and FASS L5P Drop-In Series Systems
For L5P Duramax owners who are tired of dealing with brittle plastic caps every time they perform a fuel filter change, the FASS Billet Fuel Filter Cap offers a straightforward, USA-made solution that keeps your fuel filtration system sealed, functional, and easy to service for years to come.
