Billetworkz Power Steering Cap – 2015–2021 Subaru STI

Give your STI engine bay a premium, finished look with the Billetworkz Power Steering Cap. Designed specifically for 2015–2021 Subaru STI models, this billet replacement cap combines precision machining with vibrant, durable finishes to upgrade one of the most overlooked plastic pieces under the hood.

Key Features

• Precision Engineering: CNC-machined from high-quality 6061-T6 billet aluminum for strength, durability, and a perfect fit.
• Premium Finishes: Offered in multiple colors with either anodized or powder coated finishes (depending on selection) to resist corrosion and fading.
• Direct OEM Replacement: Installs in place of the factory power steering cap with no modifications required.
• Clean, Minimalist Design: Subtle yet striking look that elevates your engine bay and pairs perfectly with other Billetworkz components.

Why We Like It

It is a simple, high-impact detail that immediately makes your bay look more intentional. Swapping the faded plastic OEM cap for a machined billet piece brings your engine bay in line with the rest of your build quality.

Specifications

• Material: 6061-T6 billet aluminum
• Finish Options: Anodized or powder coated (varies by color selection)
• Design: Direct replacement power steering reservoir cap

Installation Notes

• Engine should be cool before working in the engine bay.
• Remove the OEM power steering cap from the reservoir.
• Install the Billetworkz cap in its place, ensuring it seats fully and securely.
• Do not overtighten; hand-tight is sufficient.

What’s in the Box

• (1) Billetworkz Power Steering Cap – 2015–2021 STI

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 full ecosystem of billet components, Billetworkz continues to expand its in-house capabilities to deliver precision-engineered parts enthusiasts can trust.

Compatibility & Disclaimers

Designed specifically for the 2015–2021 Subaru WRX STI power steering reservoir. Finish color may vary slightly due to anodizing/powder coating processes and display differences. Always follow OEM procedures when servicing fluid systems.