Cummins X15 Oil Filler Billet Cap.

Built for operators who take pride in every detail under the hood, this Cummins X15 billet oil filler cap replaces the factory plastic with a piece of true craftsmanship. Machined from solid 6061 billet aluminum and polished to a mirror finish, it delivers the durability, precision, and premium look your engine deserves.

The top face carries the embossed Cummins “C” logo, giving it an authentic OEM‑plus appearance while still standing out as a custom upgrade. The outer edge features precision‑cut ridging for confident grip, even with gloves or in greasy conditions.

Highly polished so if it scratches or fades it can be polished right out to brand new over and over again.

Comes with 4 different size O rings to align the C perfectly.

If a custom version is more your style don't hesitate to shoot us a message..