MMX Silicone intake hose | BMW B58 | M140i | M240i | 340i | 440i
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MMX Silicone Intake Hose – BMW B58 M140i, M240i, 340i & 440i
Improve airflow into the turbocharger of your B58-powered BMW with the MMX Silicone Intake Hose.
Designed for BMW F-Series models including the M140i, M240i, 340i and 440i, this large-diameter silicone hose replaces the restrictive factory plastic bellows pipe between the airbox and turbo inlet.
By removing the corrugated factory section and replacing it with a smoother, constant-bore intake path, the MMX hose is designed to reduce turbulence, improve airflow and enhance induction sound.
It can be used with the original BMW airbox, the MMX Performance Intake Kit or compatible aftermarket intake systems, making it a simple but effective upgrade for both standard and tuned B58 engines.
Why Upgrade the Factory B58 Intake Hose?
The original BMW intake hose uses a corrugated bellows-style design.
While this provides the flexibility required to accommodate engine movement, the internal shape can disturb airflow as air travels toward the turbocharger.
The MMX Silicone Intake Hose replaces this section with a smoother, larger-diameter pathway designed to reduce turbulence and restriction.
Potential benefits include:
- Improved airflow to the turbo
- Reduced intake turbulence
- Enhanced induction sound
- Improved engine response
- Cleaner engine-bay appearance
- Compatibility with factory and aftermarket intake systems
Key Features
- MMX Performance silicone intake hose
- Designed for BMW B58 F-Series applications
- Replaces the complete factory plastic bellows hose
- Large-diameter smooth-flowing construction
- High-quality silicone
- Reinforced in critical areas
- Designed to resist deformation under heat and load
- Retains sufficient flexibility for engine movement
- Stepped inlet and outlet
- Constant internal bore through the transitions
- Reduced intake turbulence
- Improved airflow
- Enhanced induction noise
- Deep gloss-black finish
- Compatible with OEM airbox
- Compatible with MMX Performance Intake Kit
- Compatible with suitable aftermarket intakes
- Straightforward installation
- Approximately 10-minute fitting time
- Fully reversible
- MMX part number MMR16-0501
Replaces the Factory Bellows Pipe
The MMX hose replaces the complete plastic bellows section between the airbox and turbo inlet.
The corrugated factory design introduces repeated changes in the airflow surface.
MMX replaces this with a smooth internal path, helping incoming air reach the turbocharger with less disturbance.
Large-Diameter Smooth-Flowing Design
The hose uses a large-diameter internal profile developed specifically to improve the B58 intake path.
A smoother and less restrictive intake tract can be especially useful as turbo airflow demand increases.
This makes the upgrade suitable for:
- Standard B58 engines
- Stage 1 tuned cars
- Stage 2 builds
- Higher-boost setups
- Cars with upgraded intake systems
- Fast-road builds
Stepped Inlet & Outlet
MMX uses stepped inlet and outlet sections to help maintain a more consistent internal bore.
Rather than introducing abrupt changes in diameter at either end of the hose, the stepped construction creates smoother transitions between adjoining components.
This helps promote cleaner airflow through the complete intake tract.
High-Quality Silicone Construction
The hose is manufactured from high-quality silicone.
Silicone provides an excellent balance between:
- Heat resistance
- Flexibility
- Durability
- Pressure resistance
- Engine-bay suitability
This makes it particularly well suited to the demanding temperatures and movement found within a turbocharged engine bay.
Reinforced in Critical Areas
MMX incorporates additional reinforcement into critical sections of the hose.
This helps provide the rigidity needed to resist deformation under heat and load while still retaining enough flexibility for normal engine movement.
The result is a hose that remains stable during performance driving without creating an overly rigid connection between the intake and engine.
Allows for Engine Movement
The B58 engine moves within its mounts as torque is applied.
An intake hose that is too rigid can place unnecessary stress on:
- Intake connections
- Airbox components
- Turbo inlet hardware
- Mounting points
MMX specifically designed the silicone hose to provide enough compliance to accommodate this movement safely.
Improved Airflow to the Turbo
Reducing restriction before the turbocharger can help improve the efficiency of the intake path.
The smoother MMX hose removes the turbulent bellows section found in the factory pipework and provides a more direct route toward the turbo.
MMX states that the improved airflow path can provide a worthwhile performance gain.
Enhanced Induction Sound
The MMX Silicone Intake Hose can also increase the amount of induction noise audible from the B58.
By replacing the restrictive factory pipe, more of the engine’s natural airflow and turbocharger sound can be heard.
This can include:
- More turbo spool sound
- Increased induction noise
- More audible airflow under acceleration
The difference becomes especially noticeable when the hose is combined with a performance intake.
Works with the Factory Airbox
The MMX hose can be installed while retaining the standard BMW airbox.
This makes it an ideal upgrade for owners who want:
- Improved airflow
- Subtle sound enhancement
- Factory intake positioning
- OEM cold-air feed
- Minimal engine-bay changes
It can also be paired with an MMX high-flow panel filter for a simple OEM-airbox-based intake upgrade.
Ideal with an MMX High-Flow Panel Filter
For owners retaining the original airbox, the hose works particularly well alongside an MMX Cotton Panel Air Filter.
The filter reduces restriction at the airbox while the silicone hose improves the airflow path toward the turbocharger.
Together, they provide a straightforward intake upgrade without replacing the complete factory airbox.
Compatible with the MMX Performance Intake Kit
The MMX Silicone Intake Hose is also designed to work with the MMX Performance Intake Kit.
This combination replaces both:
- The factory airbox
- The factory bellows intake hose
The result is a more comprehensive B58 intake setup with improved airflow and a significantly more pronounced induction sound.
Aftermarket Intake Compatibility
The hose is compatible with suitable aftermarket intake systems as well as the original airbox and MMX intake.
This makes it useful for cars already running a modified induction system.
MMX states that the hose provides its greatest gains when combined with the MMX intake or another compatible aftermarket intake.
Standard & Tuned B58 Applications
The MMX intake hose is suitable for both standard and modified cars.
It is particularly useful on:
- Standard road cars
- Stage 1 tuned vehicles
- Stage 2 builds
- Cars with performance intakes
- Cars with upgraded exhaust systems
- Higher-output B58 setups
- Fast-road cars
As engine airflow requirements increase, reducing restrictions throughout the intake path becomes increasingly important.
Improved Engine-Bay Appearance
The MMX hose is finished in deep gloss black.
This gives the intake system a cleaner, more premium appearance compared with the original corrugated plastic pipe.
For owners who care about engine-bay presentation, it provides a subtle visual improvement without introducing excessive colour or styling.
Simple Installation
MMX describes installation as straightforward and states that the hose can typically be fitted in around 10 minutes.
The factory bellows pipe is removed and replaced directly with the MMX silicone component.
The kit is supplied with everything required for installation.
Fully Reversible
No permanent vehicle modifications are required.
The original BMW intake hose can be reinstalled later if required, making the upgrade completely reversible.
BMW F20 / F21 M140i
The MMX Silicone Intake Hose is compatible with the B58-powered BMW F20 and F21 M140i.
It works with the factory airbox, MMX intake or compatible aftermarket intake system.
BMW F22 / F23 M240i
The hose is suitable for the BMW F22 M240i Coupe and F23 M240i Convertible.
For tuned or intake-modified M240i builds, the smooth silicone hose helps remove one of the restrictive sections in the factory intake tract.
BMW F30 / F31 340i
The MMX intake hose is compatible with the B58-powered BMW F30 340i and F31 340i Touring.
It provides the same smooth-flowing replacement for the factory plastic bellows pipe.
BMW F32 / F33 / F36 440i
The hose is also suitable for compatible B58-powered 440i applications including:
- BMW F32 440i Coupe
- BMW F33 440i Convertible
- BMW F36 440i Gran Coupe
Compatibility
Designed for B58-powered BMW F2X and F3X models from approximately 2016 onward, including:
- BMW F20 M140i
- BMW F21 M140i
- BMW F22 M240i
- BMW F23 M240i Convertible
- BMW F30 340i
- BMW F31 340i Touring
- BMW F32 440i
- BMW F33 440i Convertible
- BMW F36 440i Gran Coupe
Engine:
- BMW B58
MMX currently lists fitment as F2X/F3X, 2016+, M140i, M240i, 340i and 440i.
What's Included?
The MMX B58 Silicone Intake Hose Kit includes:
- MMX large-diameter silicone intake hose
- Required connection and installation hardware
Supplied in a deep gloss-black finish.
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