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MotoRad Spec R Racing High Pressure Radiator Cap With Lever Release
Rated 18-22 lbs psi
Suitable for motorsport, competition or tuned engines.
The MotoRad Spec R Racing Radiator Cap With Lever Release is built to maintain consistent pressure in your cooling system, helping prevent overheating during extended periods of high engine load. By increasing the pressure threshold, it raises the coolant's boiling point, improving thermal efficiency in demanding conditions.
These key features make this cap a dependable part of your cooling system:
• High-Pressure Rated Option: This listing is for the 18-22 lbs. pressure rating to suit the relevant cooling system requirement. This cap is engineered to raise the boiling point of the coolant which improves thermal efficiency and helps prevent overheating under prolonged load.
• Safety Lever Release Mechanism: This cap features an integrated lever that must be lifted before removal, which opens the pressure valve and vents pressure through the overflow tube, allowing safe removal and helping prevent scalding during service.
• OE-Quality Materials: Made using premium-grade materials that meet original equipment standards, this build quality enhances long-term reliability under sustained heat cycles and ensures consistent pressure regulation.
• Vibration-Resistant Construction: Designed to withstand the vibration levels typically experienced in high-revving engines, this construction protects sealing integrity and reduces the risk of leaks during prolonged track use.
• EasyGrip Top Design: This cap incorporates a textured surface and shaped edge profile that makes it easier to grip with gloved or oily hands, simplifying fitting and removal in tight engine bays or during quick pit checks.
• Broad Compatibility: This cap is designed to fit a wide range of vehicle makes and models, using standard sizing and sealing profiles which allows straightforward installation without modification and ensures reliable integration with existing cooling system components.
This cap helps you maintain safe and efficient coolant temperatures throughout prolonged track sessions or hard road use. With its robust pressure control and vibration resistance, it’s a smart choice for enhancing thermal stability in your cooling system. A valuable addition to your cooling setup when consistent performance under heat and pressure is essential.
Note: this cap replaces the Stant 10381 radiator caps which are no longer made by Stant. MotoRad took over production of this part.


