Custom Shift Knobs & Interior Mods

Billetworkz Engine Bay Caps Subaru STI 2015-2021

Billetworkz Engine Bay Caps Subaru STI 2015-2021 - Main image
$165 $275 In stock

Category: Engine Bay Caps

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.

    Before you pay

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    When it ships

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    Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

    Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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    If you need a refund

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    Please contact us for the refund processing timeframe before returning an item.

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    Delivery costs

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    Standard Shipping · United States: $0.00

    Express Shipping · United States: $3.99

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    Returning an item

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    United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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    Customer Reviews (5.0 / 5 · 5 reviews)

    Miles ★★★★★

    Finally, no more faded plastic caps ruining the look under the hood. These screw on perfectly and the anodized red gives a clean, uniform pop against the black engine bay.

    Carter T. ★★★★★

    The machined aluminum finish completely changed the look of my engine bay, way better than the stock plastic caps. Everything fit like it was made for the car, no wobble or fitment issues at all.

    Madison ★★★★★

    Swapping out the faded plastic caps for these billet ones completely changed the look of my engine bay. The machining is clean and they fit my STI perfectly with zero wobble. Small upgrade, but it's the first thing people notice now.