Introducing the best quality and most durable Radiator Cap on the market. Designed for high-performance applications, this radiator cap is CNC Machined from Billet 6061 Aluminum alloy to ensure maximum strength and longevity.
Designed for high-performance cooling systems, this CNC Billet Aluminum Radiator Cap is the same high-quality component we use in our radiators, expansion tanks, and swirl pot setups. Frustrated with inconsistent quality from other suppliers, we worked directly with a CNC machining company to develop our own precision-machined cap for optimal durability and fit.
Crafted from 6061 billet aluminum, this cap is lightweight, strong, and corrosion-resistant. It is available in raw aluminum or black anodized finish, providing both function and style. This cap will ensure that your cooling system maintains the necessary pressure for maximum efficiency.
Key Features:
✔ Premium 6061 Billet Aluminum – Strong, lightweight, and built for durability.
✔ Precision CNC Machined – Ensures a secure and leak-proof fit.
✔ 1.1 Bar / 16 PSI Pressure Rating – Maintains optimal cooling system performance.
✔ Fits Large 42mm Radiator Necks (42mm ID) – Designed for high-performance applications.
Specifications:
- Brand: Straightboost Performance
- Cap Pressure: 1.1 Bar / 16 PSI
- Cap Color: Raw Aluminum
- Fits: 42mm Inner Diameter (ID) Radiator Necks
- Cap Outer Diameter (OD): 70mm
What’s Included:
- 1x Pressure Cap
We also offer matching weld-on radiator necks—check our store for complete cap and weld neck packages.
Important Fitment Notice:
PLEASE MEASURE YOUR RADIATOR FILL NECK BEFORE PURCHASING! This cap is designed for 42mm inner diameter (ID) fill necks. Some radiator necks may vary slightly in size, and minor adjustments (such as filing the cap’s mounting ears by approximately 0.5mm per side) may be required for a perfect fit.
For reliability, performance, and a precision-machined finish, this CNC Billet Aluminum Radiator Cap is the ideal upgrade for your cooling system.
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