When it comes to high-performance builds, details matter. The PHR Billet Fuel Cell Cap is a perfect example of that philosophy—designed with durability, reliability, and clean aesthetics in mind.
Whether you're assembling a purpose-built racecar or upgrading a custom street machine, your fuel system deserves hardware you can count on. The PHR Billet Fuel Cell Cap delivers a rock-solid seal with a look that matches the rest of your build's quality.
Built for Performance
Each cap is CNC-machined from billet aluminum for uncompromising strength and precision fitment. The black anodized finish provides corrosion resistance and a sleek, understated appearance that complements any engine bay or trunk layout.
The cap features:
- A Finger grip for confident opening and closing—even with gloves on
- A recessed o-ring groove for leak-free sealing under pressure
- A flush-mounted profile to avoid snags or interference with bodywork
Multiple Configurations for Any Setup
We offer three styles to suit a wide range of applications:
- 6-Bolt Cap – Designed for standard 6-bolt fuel cell flanges
- 12-Bolt Cap – For larger fuel cells requiring 12-bolt pattern (adds $20)
- Weld Flange Cap – Ideal for custom tanks where a weld-on solution is needed
No matter the format, every cap is manufactured to the same high standard and built to handle the abuse of motorsport environments.
Ready to Ship
All versions of the PHR Billet Fuel Cell Cap are in stock and ship within 2–3 business days. And like all Powerhouse Racing products, they’re backed by our 30-day money-back guarantee.
Explore the product page to choose the configuration that fits your build: