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ENGINEERING THE FUTURE OF PERFORMANCE ™
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M139 WMI Kit
Purchase M139 WMI Kit
  • SKU: 01-139-02376-2

    M139 WMI Kit

  • $1,600.00 $1,600.00

  • Prop 65 warning
    Warning

    This product can expose you to chemicals including carbon black, silica - crystalline, formaldehyde, and lead which are known to the State of California to cause cancer, and lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Manufacturer Weistec
Engine Family M139
year make model trim engine
2023 Mercedes-Benz C43 AMG Base (W206) Turbocharged 2L I4 (M139)
2024 Mercedes-Benz SL43 AMG Roadster (R232) Turbocharged 2L I4 (M139)
2023 Mercedes-Benz SL43 AMG Roadster (R232) Turbocharged 2L I4 (M139)
2022 Mercedes-Benz SL43 AMG Roadster (R232) Turbocharged 2L I4 (M139)
2024 Mercedes-Benz A45 AMG S Hatchback (W177) Turbocharged 2L I4 (M139)
2023 Mercedes-Benz A45 AMG S Hatchback (W177) Turbocharged 2L I4 (M139)
See more

Product Description




Water Methanol Spray

WATER/METHANOL INJECTION

Water/Methanol Injection was originally used to reduce knock while increasing power and performance in aircraft engines and eventually came to be used in the motorsport industry where it was found to have substantial benefits on turbocharged engines. The Weistec Water-Methanol Injection System provides substantial cooling and knock-prevention benefits for the M139 engine helping improve consistency and performance. The combination of the cooling effects of methanol and the knock resistance of water results in significant gains (through improved cooling and octane) in horsepower and torque.



READY TO INSTALL

Weistec has engineered and manufactured many of the components of this system to ensure a simple and straightforward installation that a universal kit simply lacks. This system is a complete bolt-on system that can be installed without any guesswork or custom fabrication. The gains in performance paired with its consistency, makes this an essential upgrade for the M139 engine.

Complete Water Methanol Kit


Key Features

  • Reduced Intake Air Temperatures
  • Increased Knock/Detonation Resistance
  • 20-80 HP Gain*
  • 60-61 Aluminum charge pipe with intergraded injector ports
  • Vacuum/Boost Adapter
  • Water/Methanol Controller with built-in MAP sensor
  • Weistec CNC Machined Injector Bodies with built-in check valves
  • Small, Medium, and Large Quantity Injection Nozzles Included for a wide range of configuration
  • Tank with Integrated Level Sensor (actual tank may vary from images)
  • Designed for a 50/50 Water and Methanol Mixture
  • Compatible with Stock, W.3, and W.4 Turbochargers
  • All hardware and gaskets are included