Custom Shift Knobs & Interior Mods

Billetworkz Engine Bay Caps - Subaru WRX/STI 2002-2007

Billetworkz Engine Bay Caps - Subaru WRX/STI 2002-2007 - Main image
$240 $320 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!

2002-07 WRX/STI includes:

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

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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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    Standard Shipping · United States: $0.00

    Express Shipping · United States: $3.99

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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)

    Owen D. ★★★★★

    The machined aluminum feels solid in hand, not flimsy like the stock plastic ones. Popped them on my 2006 STI and the engine bay finally looks clean. Fitment was perfect with no rattling.

    Joshua ★★★★★

    The anodized red finish on these caps really pops against my WRX's black engine bay, and they screw on with a satisfyingly precise feel. I swapped out all the crusty plastic ones in under five minutes.

    Mia ★★★★★

    These machined aluminum caps fit perfectly on my 2004 STI and the anodized finish matches my other under-hood parts nicely. They're weighty and solid compared to the cheap plastic originals, and the knurled edges make them easy to grip when checking fluids.