M50 Intake Manifold Adapter Kit

The "OG" BMW M52TU/M54 to M50 Intake Manifold Adapter Kit

Now includes our new billet CCV oil drain hose plug, making the conversion one step easier.

Get the high-RPM performance benefits of the legendary BMW M50 intake manifold on your E46 or other M52TU/M54-powered BMW without the usual installation headaches.

This kit is designed to provide a clean, reliable, and reversible conversion. It retains the factory fuel rail, supports multiple throttle-body configurations, and allows the original M52TU/M54 intake manifold to be reinstalled later if needed.

Why Install an M50 Intake Manifold?

Replacing the restrictive M52TU/M54 intake manifold with an M50 manifold can provide several performance benefits:

• Up to approximately 20 horsepower naturally aspirated, depending on the application
• Improved high-RPM airflow
• Extended usable powerband
• Sharper throttle response
• Additional engine-bay clearance
• Expanded aftermarket injector options
• Eliminates the failure-prone DISA valve

Designed and manufactured in the USA using high-quality materials throughout.

For detailed installation information and our real-world experience with the conversion, visit the Tech Articles section: [HERE]

The factory DISA system primarily improves low-speed torque and drivability. For performance, racing, and boosted applications, the improved airflow of the M50 manifold is often more valuable. Unless you are worried about maximizing power under 3k RPM (nobody is), the M50 intake is for you.  For boosted applications, additional installation tips and best practices are available in the video: [HERE]

Tuning Notes

The conversion can operate properly on the factory ECU calibration.

However, a custom tune is recommended to eliminate check-engine lights and maximize the benefits of the M50 manifold. View our tuning options here: [GET TUNED!]

Base Kit Includes

• CNC-machined billet intake manifold adapter plate
• Gold-anodized 6061 aluminum CCV oil drain hose plug
• Fuel rail adapter plates for retaining the factory fuel rail
• ICV port-blocking plugs
• Required installation hardware

Throttle-Body Compatibility

The billet adapter plate includes mounting provisions for:

• M52TU cable-driven throttle body
• M54B25 electronic throttle body
• M54B30 electronic throttle body

Optional Silicone Hose Kit

Complete the conversion with our motorsport-grade silicone hose kit.

Designed to handle naturally aspirated or boosted applications, the kit provides a clean, professional installation and includes the required hoses along with a red-anodized billet ICV fitting.

Many customers route the MAF back to the factory airbox, which is often the cleanest and most effective overall configuration.

Hose Size Selection

• 3-inch hose: M52TU, M54B25, and most other applications
• 3.5-inch hose: M54B30 applications

Optional Injector Spacer Kit

Recommended when using aftermarket injectors for boosted applications.

Without the correct spacers, some injectors can sit too deeply in the M50 manifold, potentially causing vacuum or boost leaks. These spacers position the injectors correctly while retaining the factory-style fuel rail arrangement.

Optional Port-Matching Templates

For maximum airflow and performance, add our 3D-printed port-matching templates.

The templates provide a consistent profile for matching the cylinder-head intake ports to the larger M50 manifold runners. Simply grind each port until it matches the template.

See the Tech Article linked above for complete port-matching information.

ICV Port Plug Install Notes

The included aluminum inserts block the factory ICV passages in the cylinder head without removing the head or performing permanent modifications. The plugs are installed with thread sealant and form their threads directly into the soft aluminum ports. This avoids conventional tapping and helps prevent metal debris from entering the engine.

The items installed or applied to vehicles are intended strictly for off-road use only and track vehicles. These modifications may not comply with emissions, safety, or environmental regulations required for public road use under Environmental Regulatory Agency (ERA) laws. It is the sole responsibility of the vehicle owner or operator to ensure adherence to all applicable local, state, and federal regulations. Use on public roads may result in legal penalties or vehicle impoundment. Always verify compliance with local authorities before installation.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

If you're unsure whether a part will fit your vehicle, feel free to contact us here with your inquiry. Our helpful sales team will reach out to confirm if it's the right match for you.

We offer a flat-rate shipping fee across the continental United States. This excludes Alaska, Hawaii, and U.S. territories. For international orders, additional shipping costs will apply. Please contact us for a quote if you are outside the continental U.S.

Also, feel free to also contact us at ColoradoN5X@Gmail.Com for any other questions.

Not all items are covered by warranty. Items including warranty, will clearly state that there is warranty within the product description. Most of these items will be a standard 1-year warranty against manufacture defects. You, the customer, will be responsible for shipping and handling. We will fix/replace that item with a product that is in working condition if you meet the warranty criteria. Please note that you will be allowed ONLY 1 claim within the year for that product. ColoradoN5X is not responsible for any damage caused during the installation of our products.