
Billetworkz Engine Bay Caps - Subaru WRX 2015-2021 & 2022+
Upgrade your WRX engine bay from tired plastic to premium billet. The Billetworkz Engine Bay Cap Set replaces the crusty, faded factory caps with CNC-machined 6061 aluminum pieces finished in vibrant, durable coatings for a clean, custom look that matches the rest of your build.
Key Features
- CNC-Machined 6061 Aluminum: Precision fit and long-term durability.
- Premium Finishes: Anodized or powder coated (finish type varies by color) for color depth and protection.
- Direct Replacements: Designed to install in place of the factory caps with OEM-style fitment.
- Cohesive Aesthetic: Instantly elevates the engine bay with a unified billet look.
Set Contents (Both Generations)
- Oil Cap
- Wiper Fluid Cap
- Coolant Overflow Cap
- Brake Fluid Cap
Why We Like It
It’s a fast, high-impact refresh. These caps replace the most visible plastics with precise, color-stable billet pieces that make your bay look purposeful and well-finished.
Specifications
- Material: 6061 aluminum, CNC-machined
- Finishes: Anodized or powder coated (depending on color)
- Design: Vehicle-specific, direct replacement
Installation Notes
- Install with the engine cool and on level ground.
- Remove OEM caps and seat each Billetworkz cap per its location; ensure seals/O-rings (where applicable) are clean.
- Hand-tighten oil cap; do not over-torque.
- After first heat cycle, verify caps remain secure and leak-free.
What’s in the Box
- (1) Oil Cap
- (1) Wiper Fluid Cap
- (1) Coolant Overflow Cap
- (1) Brake Fluid Cap
About Billetworkz
With more than a decade of innovation and in-house machining, Billetworkz delivers precision-engineered accessories that blend form and function—building on a legacy that began with their foundational shift knobs.
Compatibility & Disclaimers
Designed for the listed WRX applications. Finish color may vary slightly due to anodizing/powder coat processes and screen differences. Always follow OEM procedures when servicing fluid systems.
Original: $1,576.00
-65%$1,576.00
$551.60More Images



































Billetworkz Engine Bay Caps - Subaru WRX 2015-2021 & 2022+
Upgrade your WRX engine bay from tired plastic to premium billet. The Billetworkz Engine Bay Cap Set replaces the crusty, faded factory caps with CNC-machined 6061 aluminum pieces finished in vibrant, durable coatings for a clean, custom look that matches the rest of your build.
Key Features
- CNC-Machined 6061 Aluminum: Precision fit and long-term durability.
- Premium Finishes: Anodized or powder coated (finish type varies by color) for color depth and protection.
- Direct Replacements: Designed to install in place of the factory caps with OEM-style fitment.
- Cohesive Aesthetic: Instantly elevates the engine bay with a unified billet look.
Set Contents (Both Generations)
- Oil Cap
- Wiper Fluid Cap
- Coolant Overflow Cap
- Brake Fluid Cap
Why We Like It
It’s a fast, high-impact refresh. These caps replace the most visible plastics with precise, color-stable billet pieces that make your bay look purposeful and well-finished.
Specifications
- Material: 6061 aluminum, CNC-machined
- Finishes: Anodized or powder coated (depending on color)
- Design: Vehicle-specific, direct replacement
Installation Notes
- Install with the engine cool and on level ground.
- Remove OEM caps and seat each Billetworkz cap per its location; ensure seals/O-rings (where applicable) are clean.
- Hand-tighten oil cap; do not over-torque.
- After first heat cycle, verify caps remain secure and leak-free.
What’s in the Box
- (1) Oil Cap
- (1) Wiper Fluid Cap
- (1) Coolant Overflow Cap
- (1) Brake Fluid Cap
About Billetworkz
With more than a decade of innovation and in-house machining, Billetworkz delivers precision-engineered accessories that blend form and function—building on a legacy that began with their foundational shift knobs.
Compatibility & Disclaimers
Designed for the listed WRX applications. Finish color may vary slightly due to anodizing/powder coat processes and screen differences. Always follow OEM procedures when servicing fluid systems.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Upgrade your WRX engine bay from tired plastic to premium billet. The Billetworkz Engine Bay Cap Set replaces the crusty, faded factory caps with CNC-machined 6061 aluminum pieces finished in vibrant, durable coatings for a clean, custom look that matches the rest of your build.
Key Features
- CNC-Machined 6061 Aluminum: Precision fit and long-term durability.
- Premium Finishes: Anodized or powder coated (finish type varies by color) for color depth and protection.
- Direct Replacements: Designed to install in place of the factory caps with OEM-style fitment.
- Cohesive Aesthetic: Instantly elevates the engine bay with a unified billet look.
Set Contents (Both Generations)
- Oil Cap
- Wiper Fluid Cap
- Coolant Overflow Cap
- Brake Fluid Cap
Why We Like It
It’s a fast, high-impact refresh. These caps replace the most visible plastics with precise, color-stable billet pieces that make your bay look purposeful and well-finished.
Specifications
- Material: 6061 aluminum, CNC-machined
- Finishes: Anodized or powder coated (depending on color)
- Design: Vehicle-specific, direct replacement
Installation Notes
- Install with the engine cool and on level ground.
- Remove OEM caps and seat each Billetworkz cap per its location; ensure seals/O-rings (where applicable) are clean.
- Hand-tighten oil cap; do not over-torque.
- After first heat cycle, verify caps remain secure and leak-free.
What’s in the Box
- (1) Oil Cap
- (1) Wiper Fluid Cap
- (1) Coolant Overflow Cap
- (1) Brake Fluid Cap
About Billetworkz
With more than a decade of innovation and in-house machining, Billetworkz delivers precision-engineered accessories that blend form and function—building on a legacy that began with their foundational shift knobs.
Compatibility & Disclaimers
Designed for the listed WRX applications. Finish color may vary slightly due to anodizing/powder coat processes and screen differences. Always follow OEM procedures when servicing fluid systems.
























