E46 Intake upgrade M50 manifold swap

M50 Intake Manifold Adapter Kit

Get all of the benefits of the legendary BMW M50 intake manifold on your E46 or other M52TU/M54 powered BMW, without the hassle. Retain the ability to revert to the M54 manifold if needed. Designed and manufactured in the USA, this kit spares no cost and uses only quality materials. 


Check our "Tech Articles" section for installation information and our experience with the intake HERE!


This kit will run on the stock ECU tune fine, but if you would like a tuned ECU to match, get rid of check engine lights, and get even more of a power bump; visit our tuning listing here: GET TUNED!


Replacing the M52TU/M54 intake manifold with the M50 intake has many benefits, including:

  • Increase in power- About 20hp N/A depending on application
  • More flow at high RPM, for an extended powerband
  • Better throttle response
  • More engine bay room
  • More injector options
  • Removes the DISA valve, which often fail and only functions in slow city driving, not performance environments


Our kit includes includes options for using either your M54 electronic throttle body on the M50 manifold, or a spacer plate for the standard M52TU throttle body. Included with all kits is hardware and inserts to plug the ICV ports in the head without any need to remove the head or use special tools. Fits both 2.5L, 2.8L and 3.0L throttle bodies. Free domestic shipping, as always!


Add our silicone hose kit. Msde from motorsports grade materials ready to handle any level of boost. Also great for a clean install on any vehicle. Includes all hoses required to install your original ICV. 


Add the billet ICV fitting. The stock fitting is plastic and brittle- Not good for boost or ihgh engine bay temps! This one will stay in place no matter what- increased reliability and bling!


Fuel rail adatpers: You can either order our fuel rail adapter kit to easily use your stock fuel rail on the M50 manifold, or ball out and get the billet fuel rail which is a real motorsports grade setup. Doesn't hurt that it also looks great as well. Great for pass through fuel systems and using an aftermarket fuel regulator.


Injector Spacer kit recommended for aftermarket injectors. These spacers are sometimes required on aftermarket slim body injectors so they don't push too far down into the intake manifold and create a vacuum or boost leak.in the future. 


Port Matching Templates: To get max gains out of the M50 manifold you can easily port match your head using our 3d printed port templates. Just grind down the head until you reach the template. Look at our tech article posted above for more info. 


If you have any questions or need any of these products separate, send us a message via email or instagram and we'll respond asap.



Due to the intended use of high performance products, Seems Legit Garage, LLC. ("SLG”) products and each part thereof, are sold "AS IS” and with all faults. To the fullest extent allowed by law, SLG Racing Products makes NO written, oral, expressed, or implied statement of warranty or guarantee on any product or part sold. SLG will not be liable for any direct, indirect, incidental, consequential, or special damages, including but not limited to, damage, injury, loss of life, loss of property or equipment, loss of profits or revenue, or claims from any individual or entity arising from the use of any SLG product. 

RACING IS A DANGEROUS ACTIVITY AND PURCHASERS OF SLG PRODUCTS ACKNOWLEDGE THE INHERENT RISKS ASSOCIATED. SLG MAKES NO REPRESENTATIONS THAT ITS PRODUCTS CAN REDUCE OR ELIMINATE ANY SUCH RISK. SLG products are NOT FOR STREET, HIGHWAY, OR AIRCRAFT USE and are intended ONLY for race vehicles operated on closed-course facilities or race tracks with appropriate supervision of qualified technicians or mechanics to ensure that the safety needs of the race driver and others are met. SLG products could be combined with other products or parts which may not be suitable and could adversely affect performance of other race parts or the vehicle. The user shall determine the ultimate suitability and safety of the product for its intended use, and the user assumes all responsibility and risk in connection therewith. 

Adapter Plate Style
Silicone Hose Kit
Billet ICV Fitting
Fuel Rail Options
Injector Spacers
Port Matching Templates