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Made in USA, Weighted Feel, Custom Fitment
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Billetworkz Engine Bay Caps Subaru STI 2015-2021

$275.00
$275.00
Shipping calculated at checkout.
Engine Bay Cap Color: Black

Tired of a boring engine bay? Upgrade instantly with Billetworkz Engine Bay Caps.

The Problem: Crusty, faded factory caps are ruining your engine bay's look.

The Solution: Upgrade to a Billetworkz Engine Bay Cap Set!

These are direct factory replacements—CNC machined from 6061 aluminum and finished with a durable, vibrant anodized finish, or powder coated depending on the color. They offer a flawless fit and a clean, custom aesthetic that truly sets your Subaru apart.

Ready to trash the plastic and install a premium billet upgrade? Do it today!

    2015+ STI Includes:

    • Oil Cap
    • Wiper Fluid Cap
    • Coolant Overflow Cap
    • Brake Fluid Cap
    • Power Steering Fluid Cap

    Why Choose Billetworkz?

    At Billetworkz, we pride ourselves on delivering top-tier automotive accessories that blend performance with aesthetics. Our Engine Bay Caps are a testament to our commitment to quality and design excellence.

    Materials

    • CNC-machined from high-quality 6061-T6 billet aluminum
    • Powder coated, or anodized, for long-lasting color and protection
    • Designed to withstand high engine bay temperatures and resist corrosion
    • Smooth, precision-cut details for a clean, high-performance look

    Specs

    Type: Factory replacement caps – not covers

    Fitment: Engine-specific designs for direct replacement of OEM caps

    Available Cap Types (varies by listing):

    • Oil Cap
    • Coolant Overflow Cap
    • Brake Fluid Cap
    • Washer Fluid Cap
    • Power Steering Cap

    Powder Coat Colors:

    • Neon Yellow
    • Hyper Teal
    • Red Wrinkle
    • Gloss White
    • Hyper Pink

    Anodized Colors:

    • Black
    • Blue
    • Red
    • Silver
    • Gold
    • Purple

    Installation Guide

    Installing your product is simple—and we’ve got you covered.

    Watch Install Video Here:

    Watch on YouTube →

    Need More Help?

    View All Install Guides →

    Processing Time

    Most orders ship within 1–3 business days, but processing times can vary depending on inventory, color selection, and customization options.

    Billetworkz Engine Bay Caps Subaru STI 2015-2021

    $275.00

    Engine Bay Aesthetic — Custom Colors & Finish Options

    Choose from a variety of colors and finishes to match — or accent — your build. Swap out faded plastic caps for a sleek, custom look that sets your engine bay apart.

    OEM-Fit, Direct Replacement Caps

    Replaces your stock fluid caps — oil, coolant, brake, washer, and more — with full billet aluminum caps that screw in or snap in just like factory parts. No modifications needed.

    Functional & Clean — Form Without Sacrifice

    These caps maintain OEM threads and fitment tolerances, so you get upgraded looks without compromising function or safety. A clean, cohesive engine bay that still works as intended.