RAM Billet Fuel Caps: 6.7L Cummins Protection
Our premium diesel and DEF fill caps are available for 4th Gen 2013–2018 RAM 6.7L and 5th Gen 2019–2026 RAM 6.7L trucks. These pieces of automotive jewelry replace the flimsy factory plastic caps. Machined from 6061 anodized billet aluminum for maximum durability, the caps feature beveled edges and large grips that make them easy to remove even while wearing heavy work gloves. Both caps integrate strong neodymium magnets that conveniently stick to your fuel door hinge while at the pump—ensuring you never misplace or drive off without your cap again. Just twist to lock them into place. Their airtight Viton O-rings form a positive seal that stops dirt, moisture, and debris from contaminating your high-pressure fuel injection or emissions systems.

While these caps might not increase your fuel economy or horsepower output, they keep costly debris out of your fuel and DEF tanks and look incredible doing it.
- Prevents dirt and moisture from entering filler necks
- Durable Viton O-ring seal for airtight protection
- Strong neodymium magnets adhere securely to fuel door hinge
- Precision CNC-machined from 6061 billet aluminum
- Anodized green and blue finishes for corrosion resistance
- Large knurled grip designed for easy operation
- Positive twist-to-lock action
- Laser-etched Banks Power branding
Related RAM Cummins Protection & Billet Upgrades
- Review how the Banks billet aluminum hitch cover combines precision CNC styling with heavy-duty receiver tube protection.
- Inspect flow bench data in this Monster-Ram vs Black Market comparison proving superior airflow and grid heater protection.
- Explore how Cummins adopted Banks side draft intake engineering on the 2025 RAM 6.7L turbo diesel engine.
- Discover real-world towing fluid results in this RAM 2500 differential cover upgrade reducing heavy axle gear temperatures.


