Sale Price: $61.99
Clearance Price: $46.99
All sales are final for clearance items.
We do our best to show in the pictures any blemishes, scratches or dents, all blemishes are purely aesthetic and do not affects the performance or reliability of the part. Due to inventory variances, pictures may not reflect the actual blemishes and should be referred to as examples.Sinister Diesel Billet Fuel Plug/Cap – 2013+ Cummins
Fits 2013–Present Ram 2500/3500 with 6.7L Cummins Diesel
Note: This fuel plug replaces the factory plug found inside the filler neck on pickup models. It is not the same style as the traditional screw-on or snap-fit caps used on flatbeds or cab-and-chassis setups.
Key Features
• CNC-machined from solid T6-6061 billet aluminum for superior strength
• Anodized in Limited Edition Sinister Green for durability and custom appearance
• Laser-etched Sinister Diesel logo
• Tight-sealing Viton O-ring prevents dirt, dust, and moisture intrusion
• Integrated magnet in the base allows secure storage on the fuel door or body panel while fueling
• Direct replacement for the flimsy factory plastic filler-neck plug
• 2-year warranty
Product Overview
The Sinister Diesel Billet Fuel Plug/Cap is the perfect upgrade for 2013+ Ram Cummins owners who want better protection for their fuel system. The factory plug is a small plastic piece that wears out easily and offers limited sealing capability. Our billet aluminum plug replaces it with a precision-machined, O-ring–sealed solution that keeps contaminants out of your tank.
Finished in Limited Edition Sinister Green and laser-etched for a clean look, this plug combines durability with style. A built-in magnet allows you to securely attach the plug to your truck while fueling, preventing drops, misplacement, or contamination. Because this part is designed specifically for pickup filler-neck plugs, it does not replace traditional screw-on caps used on cab/chassis or flatbed trucks.
What’s Included
• (1) Sinister Diesel Billet Fuel Plug/Cap
• (1) Viton O-ring
Frequently Asked Questions (FAQ)
Q: Does this replace a traditional screw-on fuel cap?
A: No. This plug replaces the small factory insert plug found in pickup filler necks. Trucks with screw-on or snap-fit caps (such as cab-and-chassis or flatbed applications) use a different style of cap.
Q: Will this trigger a check engine light or fuel system warnings?
A: No. The plug functions exactly like the factory insert and does not affect pressure sensors or EVAP-related systems.
Q: Is the magnet safe for painted surfaces?
A: Yes. The magnet is strong enough for secure storage during fueling, but we still recommend placing it on a clean surface to avoid debris scratching the paint.
Q: How long does the O-ring last?
A: Viton O-rings are extremely durable. Under normal use, they last many years, but they are inexpensive and easy to replace if needed.
Q: Will it fit my 2013+ truck?
A: Yes, as long as it is a standard pickup model. Cab/chassis models with traditional threaded caps are not compatible.
