Mugen High Pressure Radiator Cap Honda Civic FL 21+ inc Type R

Mugen High Pressure Radiator Cap Honda Civic FL 21+ inc Type R

Mugen’s high pressure radiator cap raises the pressure in the cooling system, which raises the coolant’s boiling point and improves cooling efficiency.

It is most effective under high loads, such as sports or track driving. It raises the cap pressure from the standard 1.1 kgf/cm² to 1.3 kgf/cm².

Specifications

• Standard pressure: 1.1 kgf/cm²
• Mugen cap pressure: 1.3 kgf/cm²
• Fitting time: approx. 0.1 hours

Key Features

• Raises cooling system pressure
• Higher coolant boiling point
• Improved cooling under high load
• Direct replacement for the standard cap
• Mugen design

What’s in the Box?

• High pressure radiator cap

Fitment

• Honda Civic 11th generation (2021 onwards), all grades listed by Mugen

Not suitable for: cars other than those listed.

Installation

Only remove or fit the radiator cap with the engine completely cold. Opening it hot can cause serious burns. Check the coolant level after fitting. Mugen quotes approx. 0.1 hours.

What does a higher pressure cap do?

It raises the coolant’s boiling point, so the system copes better with heat under high load.

Is it safe for daily driving?

Yes. It is a direct replacement for the standard cap.

Can I fit it myself?

Yes, but only with the engine completely cold.

Part reference

• 19045-XGER-0000

With roots in Japanese motorsport dating back to 1973, Mugen holds a distinctive place in Honda’s performance heritage. Its history in race-engine development and competition shapes a range of performance parts and accessories prized by Honda enthusiasts for their engineering, purposeful design and unmistakable identity.