The problem with the stock 2019+ Ram diesel filler cap is simple: it is flimsy, easy to lose, and does a poor job sealing the filler neck from dirt and oily contamination. Our Revolver Billet Fill Caps fix that with a positive-locking design, an O-ring seal, and built-in magnets that keep the cap attached to the filler door while you fuel up. We built matching caps for both the diesel and DEF filler necks, so you get a cleaner, more secure seal where the factory pieces fall short.
The video opens with a common complaint among Ram owners: the stock diesel fuel cap is easy to lose and does a poor job of keeping dirt, oily residue, and grime out of the filler neck.
The factory cap is described as flimsy and inexpensive, creating an opportunity for a more durable and functional replacement.
Banks approached the fuel cap as an engineering problem rather than a simple cosmetic upgrade.
Drawing on 66 years of engineering experience, the company set out to improve durability, sealing, retention, and everyday usability in a component owners handle every time they refuel.
The result is the Banks Revolver Fuel Cap, designed specifically for 2019-and-newer Ram Cummins trucks.
Rather than functioning purely as a dress-up accessory, the Revolver is intended as a functional replacement for the factory diesel fuel cap.
The Revolver uses a positive-locking design and an O-ring seal.
Together, these features are intended to securely retain the cap while creating a better barrier against dirt, oily residue, and other contamination entering the filler neck.
Built-in magnets help prevent the cap from being misplaced during refueling.
Instead of setting the cap down or risking leaving it behind at the pump, the magnetic design gives the owner a convenient way to keep track of it while filling the truck.
Banks emphasizes both the engineering and appearance of the Revolver.
The cap is designed to provide better sealing, retention, and durability than the stock component while also giving the fuel-fill area a more substantial finished appearance.
Banks also offers a matching cap for the DEF filler neck.
Together, the diesel and DEF caps create a coordinated pair rather than leaving one factory cap alongside the upgraded Revolver.
Banks billet fill caps are available now for Ram applications.
The company also plans to expand the lineup with versions for GM and Ford trucks, bringing the same design approach to additional diesel platforms.
