W.M.D. 45 Supercharger Kit

M45 Supercharger

Original price was: $1,579.Current price is: $1,182.

Average power curve: 250 – 310 HP♠
(See performance specifications below for more information)

The W.M.D. 45 Supercharger Kit is designed around the Mercedes based Eaton M45 supercharger for the 4-cylinder BMW M42, M43 and M44 Engines, capable of pushing these engines far beyond the S42B20 Race Engine used in the German Super Tourenwagen Cup in the early 90’s!

This supercharger system supports a wide range of classic BMW models such as the E30, E36, E46, Ti, Z3 models.

Pre-Order Product: This product is available on a special Pre Order discounted price. A minimum deposit of 50% is required for us to accept your pre order, the remainder can be paid when we are ready to ship. The estimated time frame of delivery is Late May – Mid June 2024.
All terms and conditions apply. Contact us directly for any questions.


The W.M.D. 45 stands for Werner Mayerhofer Designs. Originally designed in Ireland between 2021 – 2022,  this Supercharger Kit is designed to be used on the BMW 4 Cylinder M44 Engine with support for the M42 and M43. With full air to air intercooling support, this kit is capable of pushing the stock engine to its safe limits.

This setup comes with its own custom crank pulley, tensioner and independent belt drive which allows you to preserve all the original stock belt driven engine accessories as the alternator, power steering, air conditioner, all in their original position.


  • Complete Set of Brackets
  • Supercharger Discharge Pan with Inlet and Outlet manifolds for the M45 Supercharger
  • Custom Drive Pulley (Replaces Power Steering pulley)
  • Gates T38311 Belt Tensioner System with Independent Belt Drive (Included with orders from summer 2024 onwards)
  • Idler Pulleys
  • Proper Gaskets – (Included with orders from fall 2024 onwards)
  • Full set of Fasteners (nuts, bolts and spacers)
  • Finished in Powder Coated Raceway Red colour (Supercharger Kit)
  • Guaranteed 36 months craftsmanship warranty**


Supported BMW models & cars due to using 4-cylinder BMW M42, M43 & M44 engines:

  • 1989–1991 E30 318is
  • 1990–1992 E30 318i
  • 1992–1995 E36 318i
  • 1991–1995 E36 318is
  • 1994–1995 E36 318ti
  • 1996-2000 E36 318i, 318is and 318ti
  • 1996-1999 Z3 1.9
  • 1992-1998 E36 318i
  • 1994-1996 E34 518i
  • 1995-1996 E34 518g Touring
  • 1995-2001 Z3 1.8
  • 1999-2001 E36 316i Compact
  • 1999-2002 E46 316i
  • 1998-2001 E46 318i/318Ci
  • 1999 -2002 Z3 1.9



  • The Supercharger is not included in the kit and you are advised to use the given part number for the supercharger and order the supercharger locally.
  • Stock M45 pulley will limit the boost to 8PSI with an air to air intercooler, For 12+ PSI you will have to rebuild the M45 Supercharger with new bearings and use any available Hyde Motor Works overdrive pulley made for the M45 Supercharger.
  • On the older M42/M43 Engines with the V Belt drive system, you must upgrade to the newer Micro V belt system from the newer M42/M43/M44 engines. Having the M44 Manifold is recommended for best fitment.
  • Currently the kit supports only the Eaton M45 Supercharger, future support will be added for the Eaton M62. *


To complete the installation on any of the setups, you will also require the following additional parts:

  • Eaton M45 Supercharger (Mercedes variant only, check the technical specifications for part numbers)
  • an Intercooler Kit with silicone pipes and hose clamps (can be sold separately)
  • vacuum hose
  • an high flow air filter
  • a boost gauge
  • a recirculating by pass valve and
  • proper tune.


Please consult the installation guide for more information.

For Tuning, We recommend using any of our selected tuner partners.
Tuning Packages may also be offered in our shop.

Please check our Product Finder for all parts available in our shop necessary for this setup.
For more information on the W.M.D. 45 Supercharger Kit please check the overview on Our Products page.

Additional information

Weight12 kg

Eaton M45: 7-14PSI*

Boost will depend on the pulley used on the supercharger, we recommend rebuilding the supercharger with new bearings if you wish to run it with a smaller pulley!

Chassis Fitment & Engines

All BMW M44, M43 and M42* found in BMW E30, E34, E36, E38, E39, E46, Z3, Z4**


For compatibility, you must use small body M45 with the short snout and small body variant commonly found in the Mercedes Kompressor models.

Supported Eaton M45 Supercharger Part:

MB part # 1110901080
Eaton part number 207018

Application: SLK200, SLK230, 2000 – 2004 with M111 engines 2.0L, 2.3L engine.

Older BMW M42 Engines with V Belt drive must be converted to use the newer Micro V Serpentine Belt with a more modern alternator and also suggest using the M44 style OBD II manifold for proper fitment*

Not all models of chassis have been tested, if you would like to check with us your chassis measurements before buying, please email us.**