Billetworkz Oil Filler Cap – 2013–2021 FR-S / 86 / BRZ / 2015–2021 WRX / STI

Upgrade one of the most used and most visible components in your engine bay with the Billetworkz Oil Filler Cap in Black. This direct replacement cap swaps the tired factory plastic for a precision CNC-machined billet piece that delivers a clean, minimalist look with OEM-level fitment and function across the FA20 and EJ platforms.

Key Features

• Precision Engineering: CNC-machined from high-quality 6061-T6 billet aluminum for durability and a perfect fit.
• Black Finish: Clean, understated styling with a durable finish designed to resist corrosion and wear.
• Direct OEM Replacement: Installs in place of the factory oil filler cap with no modifications required.
• Enhanced Aesthetics: Minimalist design that instantly cleans up the engine bay and pairs well with other Billetworkz caps.

Why We Like It

The oil cap is a frequent touch point and a focal area under the hood. This Billetworkz upgrade adds a premium, purposeful look while keeping the everyday usability you need for routine maintenance.

Specifications

• Material: 6061-T6 billet aluminum
• Color: Black
• Fitment Style: Direct replacement oil filler cap

Installation Notes

• Install with the engine off and cool.
• Remove the OEM oil filler cap.
• Install the Billetworkz cap and ensure it is fully seated.
• Hand-tighten only; do not over-torque.

What’s in the Box

• (1) Billetworkz Oil Filler Cap – Black

About Billetworkz

Billetworkz has earned its reputation as a leading manufacturer of premium automotive accessories through more than a decade of innovation and quality craftsmanship. From foundational shift knobs to a complete ecosystem of billet upgrades, Billetworkz continues to deliver precision-engineered components enthusiasts can trust.

Compatibility & Disclaimers

Designed for the listed FR-S, 86, BRZ, WRX, and STI applications. Ensure the cap is fully seated before driving. Always follow OEM procedures when servicing engine oil.