Motorad MRD510 Spec-R Safety Lever Racing Radiator Cap 21-25 PSI

The Motorad MRD510 Spec-R Safety Lever Racing Radiator Cap is engineered for high-performance and racing cooling systems that demand reliable pressure control under extreme conditions. Rated at 21–25 lbs of pressure, this cap raises the boiling point of your coolant to help your engine maintain peak efficiency during the most demanding on-track and high-output driving situations.

The integrated safety lever mechanism locks the cap securely to the radiator filler neck. Before removal, the lever must be lifted, which opens the pressurizing valve and vents system pressure safely through the overflow tube—protecting the user from scalding coolant and hot steam during hot removal.

Key Features:

• 21–25 lb pressure rating designed for racing and high-performance cooling systems
• Safety lever locks cap to filler neck and safely vents pressure before removal
• Part of the MotoRad Spec-R lineup, engineered for tuned turbo and high-output engines
• Manufactured to IATF 16949-certified quality standards
• Premium OE-quality materials for durability under sustained high heat and pressure
• Distinct high-performance design with EasyGrip construction for simple installation and removal
• Designed and tested to meet or exceed the highest quality standards
• Factory-tested prior to shipping

The MotoRad Spec-R line is built for drivers who require stable coolant temperatures and consistent pressure control lap after lap. The MRD510 is an ideal upgrade or replacement cap for performance builds, track day vehicles, and competition-prepped cooling systems.