MMX Performance Intercooler | MINI F56 Cooper S & JCW

Keep charge temperatures under control and maintain consistent performance with the MMX Performance Intercooler for the MINI F56 Cooper S and John Cooper Works.

Available in two application-specific variants, the MMX intercooler provides a substantial increase in cooling capacity over the factory unit while retaining straightforward, bolt-on installation.

Choose from:

• MMR05-1402 – MINI F56 Cooper S
• MMR05-1401 – MINI F56 John Cooper Works

Both versions use MMX's large tube-and-fin stepped intercooler core, providing approximately 90% more internal volume and around 70% greater frontal area than the original MINI intercooler.

The result is significantly improved charge-air cooling, better resistance to heat soak and more consistent power delivery during repeated acceleration, fast-road driving and tuned applications.

Why Upgrade the Factory Intercooler?

Turbocharging increases the temperature of the intake air as it is compressed.

Before this air enters the engine, the intercooler must remove as much heat as possible.

As boost pressure and engine output increase, the standard MINI intercooler can begin to struggle with repeated high-load use.

Higher charge temperatures can contribute to:

• Reduced power
• Reduced torque
• ECU timing reduction
• Inconsistent performance
• Increased heat soak
• Longer recovery periods between hard acceleration runs

The MMX intercooler dramatically increases the available cooling capacity to help control these temperatures.

Key Features

• MMX Performance Intercooler
• Suitable for MINI F56 Cooper S
• Suitable for MINI F56 John Cooper Works
• Cooper S SKU: MMR05-1402
• JCW SKU: MMR05-1401
• Application-specific variants
• Large tube-and-fin stepped core
• 590mm x 225mm x 145mm core
• Approximately 70% larger frontal area than OE
• Approximately 90% more internal volume than OE
• Internal turbulators
• CFD-optimised end tanks
• Significant reduction in charge-air temperatures
• Designed for minimal pressure drop
• No noticeable increase in turbo lag
• Anti-corrosive thermal coating
• Approx. 9.2kg weight
• Suitable for standard and tuned cars
• No cutting required
• No permanent vehicle modifications
• Chargepipes available separately
• Pre-LCI applications only

Two Application-Specific Variants

This product page covers two separate MMX intercooler variants.

MMR05-1402 – Cooper S

Designed specifically for applicable MINI F56 Cooper S applications.

MMR05-1401 – John Cooper Works

Designed specifically for applicable MINI F56 John Cooper Works applications.

Although both versions share the same performance-oriented design philosophy and cooling specifications, the correct variant must be selected for the vehicle.

90% More Internal Core Volume

The MMX intercooler provides approximately 90% more internal core volume than the factory unit.

This near-doubling in volume significantly increases the intercooler's thermal capacity.

A larger core can absorb and dissipate more heat before becoming saturated, helping maintain lower intake temperatures during repeated high-load driving.

70% Larger Frontal Area

The MMX intercooler also increases frontal area by approximately 70% compared with the original MINI unit.

This exposes a much larger section of the intercooler core to incoming ambient airflow.

The increased frontal area improves heat transfer during:

• Fast-road driving
• Motorway acceleration
• Track use
• Hot-weather driving
• Repeated boost events

590 x 225 x 145mm Stepped Core

The MMX intercooler uses a substantial:

590mm x 225mm x 145mm

tube-and-fin stepped core.

The stepped design makes effective use of the available space within the MINI front end, significantly increasing cooling capacity without requiring extensive vehicle modification.

Tube-and-Fin Construction

MMX uses a tube-and-fin core design to balance cooling efficiency against pressure drop.

This construction helps provide:

• Strong heat transfer
• Efficient airflow
• Low weight
• Minimal restriction
• Consistent cooling performance

For a road and fast-road car, this balance is important because an intercooler must reduce temperature without unnecessarily restricting airflow.

Internal Turbulators

The core incorporates internal turbulators designed to improve the transfer of heat from the compressed intake charge into the intercooler structure.

These increase interaction between the hot charge air and the internal cooling surfaces, helping improve overall thermal efficiency.

CFD-Optimised End Tanks

Intercooler performance depends not only on core size but also on how effectively air is distributed across it.

MMX uses CFD-optimised end tanks to help provide even airflow across the core while reducing unnecessary turbulence and restriction.

This allows the larger core to be used more effectively.

Lower Charge-Air Temperatures

The primary purpose of the MMX intercooler is to reduce charge-air temperature.

Cooler intake air is denser and allows the engine management system to operate under more favourable conditions.

Maintaining lower intake temperatures can help provide:

• More consistent power
• More consistent torque
• Improved resistance to heat soak
• Greater tuning headroom
• Better sustained performance

Reduced Heat Soak

Heat soak occurs when the intercooler absorbs enough heat that its ability to cool incoming charge air begins to decline.

This can become noticeable during:

• Repeated acceleration
• Track sessions
• Hot summer driving
• Tuned engine operation
• Extended high-load use

The much larger MMX core provides greater thermal capacity, helping delay and reduce heat soak.

More Consistent Performance

An upgraded intercooler is not simply about creating a higher peak power figure.

One of its biggest advantages is maintaining performance over repeated acceleration runs.

As the original intercooler becomes hotter, the engine may progressively reduce performance to protect itself.

The MMX intercooler helps control charge temperatures so the car can maintain more consistent output.

Designed for Minimal Pressure Drop

A larger intercooler must still allow air to pass through efficiently.

Excessive restriction can force the turbocharger to work harder to achieve the required manifold pressure.

MMX therefore focused development on balancing:

• Maximum intake temperature reduction
• Minimum pressure loss

This allows the system to increase cooling capacity without introducing unnecessary restriction.

Designed Without Increased Turbo Lag

Increasing intercooler volume can sometimes negatively affect throttle response if the system becomes excessively large or restrictive.

MMX states that its development achieved the increased cooling capacity without introducing increased lag.

This makes the intercooler especially well suited to performance road cars where response remains important.

Ideal for Tuned Cooper S & JCW Models

The MMX intercooler becomes particularly valuable as engine output and boost pressure increase.

Higher boost creates additional heat, placing greater demand on the charge-cooling system.

The intercooler is therefore a strong supporting modification for:

• Stage 1 tuning
• Stage 2 tuning
• Increased boost
• Performance intake systems
• Upgraded chargepipes
• Performance exhaust systems
• Turbo upgrades

Valuable on Standard Cars

An intercooler upgrade can also benefit a standard vehicle.

The increased thermal capacity can help maintain consistent performance during:

• Spirited road driving
• Repeated acceleration
• High ambient temperatures
• Track days

It also provides additional cooling headroom if further engine modifications are planned later.

Ideal with MMX Chargepipes

MMX chargepipe upgrades are available separately for compatible F-Series MINI applications.

Combining the intercooler with upgraded chargepipes provides a more complete charge-air package by addressing:

• Cooling capacity
• Pipe strength
• Airflow
• Boost reliability

For tuned builds, upgrading both systems can provide a stronger foundation for increased boost pressure.

Anti-Corrosive Thermal Coating

The MMX intercooler features an anti-corrosive thermal coating.

Located at the front of the vehicle, an intercooler is constantly exposed to:

• Water
• Road salt
• Dirt
• Heat
• Temperature changes

The protective coating helps improve long-term durability while maintaining a clean performance appearance.

Lightweight 9.2kg Construction

Despite the substantial increase in core volume, MMX quotes an intercooler weight of approximately 9.2kg.

This provides the additional cooling capacity without adding excessive weight to the front of the vehicle.

Cooper S – MMR05-1402

MMR05-1402 is the Cooper S version of the MMX Performance Intercooler.

This variant is intended for applicable pre-LCI MINI F56 Cooper S applications.

It provides:

• Approx. 90% greater internal volume than OE
• Approx. 70% larger frontal area than OE
• Tube-and-fin stepped core
• Improved heat-soak resistance
• Minimal pressure loss

Select this variant when ordering for a compatible Cooper S.

John Cooper Works – MMR05-1401

MMR05-1401 is the John Cooper Works-specific version.

It provides the same performance-focused cooling upgrade but is designed around the JCW intercooler connection arrangement.

This variant is intended for applicable pre-LCI MINI F56 John Cooper Works models.

Select MMR05-1401 when ordering for a compatible JCW.

Cooper S vs JCW Variant

These should not be treated as interchangeable solely because the cars share the same general F56 platform.

Select the intercooler variant according to the vehicle:

• Cooper S – MMR05-1402
• John Cooper Works – MMR05-1401

If there is any uncertainty regarding vehicle specification, please confirm fitment before ordering.

Pre-LCI Fitment Only

MMX specifies that these intercoolers do not fit LCI applications.

They are intended for compatible pre-LCI F-Series MINI models.

Because MINI engine and chargepipe arrangements changed during production, exact vehicle specification should always be confirmed before ordering.

Installation

The MMX intercooler is designed as a straightforward replacement for the factory unit.

MMX states that:

• No cutting is required
• No permanent vehicle modification is required

This means the intercooler provides a substantial increase in cooling capacity without requiring major alteration to the vehicle.

Compatibility

Available in two variants:

MMR05-1402

• MINI F56 Cooper S
• Pre-LCI applications

MMR05-1401

• MINI F56 John Cooper Works
• Pre-LCI applications

MMX's current technical information references B46 and B48 engine applications.

Not suitable for:

• LCI applications
• MINI F57 according to current MMX fitment information
• B48.D engine applications

Please confirm exact model year, engine code and original intercooler connection arrangement before ordering.

What's Included?

Each selected variant includes:

• 1x MMX Performance Intercooler
• Tube-and-fin stepped core
• CFD-optimised end tanks
• Required intercooler-specific fittings and hardware

Core specifications:

• 590mm x 225mm x 145mm
• Approx. 70% larger frontal area than OE
• Approx. 90% more internal volume than OE
• Approx. 9.2kg

Chargepipes are sold separately.

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