Radiator Cap for Radiato r Filler Neck #20980

The VIBRANT PERFORMANCE Radiator Cap for Radiator Filler Neck #20981 is a 16 lb pressure-rated aluminum cap engineered for high-performance cooling systems. This black anodized cap is specifically designed to work with Vibrant weld-on radiator filler necks, providing a sealed thermal environment essential for vehicles operating at extended duty cycles or elevated ambient conditions. The round profile and aluminum construction deliver proven reliability across demanding applications where temperature stability directly impacts system longevity and operational readiness.

At 16 lbs of pressure capacity, this radiator cap maintains proper coolant pressurization to raise the boiling point of the coolant fluid—a critical function for vehicles with upgraded engines, extended throttle use, or operation in high-temperature environments. The anodized aluminum finish resists corrosion and oxidation, ensuring a long service life even in vehicles exposed to salt air, humidity, or harsh chemical exposure. The direct fit design for Vibrant filler necks eliminates compatibility guesswork and ensures a proper seal without aftermarket adapters. Compact dimensions (3.6 x 1.55 x 4.55 inches) allow straightforward installation in tight engine bays without interference.

This cap is ideal for custom cooling system builds, engine swaps, or OEM system replacements where precision-matched components are required. Enthusiasts building high-output street machines, track vehicles, or off-road platforms benefit from the reliability of matched Vibrant system components. The 16 lb rating aligns with modern aluminum radiator systems and provides the pressure relief needed to prevent coolant loss and overheating during sustained performance driving.

Sold as an individual cap. Verify compatibility with your specific Vibrant filler neck model before ordering.