CUMMINS BILLET ALUMINUM OIL FILL CAP/ ON SALE

If you’re tired of dealing with cheap plastic oil caps that crack, leak, or work themselves loose, the PDI Big Boss Billet Aluminum Oil Fill Cap is a simple upgrade that adds both durability and reliability to your engine.

Factory oil fill caps are typically made from plastic, which can weaken over time from heat, vibration, and engine movement. It’s not uncommon for worn OEM caps to leak oil or even come loose while driving, creating a mess and potentially causing bigger problems.

The PDI Big Boss Oil Fill Cap is CNC machined from high-grade billet aluminum, making it far stronger and more durable than factory plastic caps. The cap features a lock-tight design that has been field tested to stay secure even under heavy vibration and demanding engine conditions.

Not only does it provide a more reliable seal, but the billet aluminum construction also gives your engine bay a clean, upgraded look.

Available For

2010–2019 Cummins Engines

• ISX12

• ISX15

• X12

• X15

Key Features

• CNC machined billet aluminum construction

• Stronger and more durable than factory plastic caps

• Lock-tight design to prevent loosening from vibration

• Helps prevent oil leaks and cap failure

• Built for long-term durability and reliability

⚠️ ON SALE – Limited Availability
Sale items are final and will not be restocked once sold out.

At Redneck Diesel Performance, we carry parts that help your truck stay reliable and ready for the road. 

For more information or help with any of your performance needs, call us at 972-921-4316.