Custom Shift Knobs & Interior Mods

"B" Stock Engine Bay Caps - B-Series - Subaru WRX / STI 2008-2014

"B" Stock Engine Bay Caps - B-Series - Subaru WRX / STI 2008-2014 - Main image
$189 $300 In stock

Category: Engine Bay Caps

Straight from the Billetworkz Backroom

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. They offer a flawless fit and a clean, custom aesthetic that truly sets your Subaru apart.

2008-2014 WRX/STI includes:

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

B-Stock items are fully functional and may come from discontinued colors, limited runs, overstock, or have minor cosmetic blemishes. Fit, performance, and durability are not affected. Quantities are limited and will not be restocked.

B-Stock items are final sale and are not eligible for returns or exchanges.

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 (4.8 / 5 · 5 reviews)

Amelia W. ★★★★★

These caps popped right into place on my STI and instantly cleaned up the look of the engine bay. The billet aluminum feels way more solid than the old plastic ones I pulled off.

Andrew Y. ★★★★★

Popped these on my 2011 STI and the engine bay finally looks as clean as the rest of the car. Fit is dead-on for the factory spots, no wobble, and the machined finish wipes down way easier than the old crusty plastic.

Sophia ★★★★★

The billet aluminum finish on these is night and day compared to the plastic caps that came on my 2011 STI. They thread on smooth and sit flush, and my engine bay finally looks like someone cares about it.