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Weistec Water|Methanol Injection System Mercedes-Benz



Model #01-275-01744-1

Shopper Award

This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles.

Purchasing this product requires you to sign our Vehicle Compliance Waiver here.

Water/Methanol injection has been in use for several decades in multiple applications. Originally, it was used to reduce knock while increasing power and performance in aircraft engines. Eventually it came to be used in the motorsports 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 to the M275-M279 Turbo V12 engines helping improve consistency and performance. The system features a Water/Methanol Controller with built in MAP sensor. This controller is a progressive controller that slowly increases injection as boost builds, resulting in smooth and seamless operation. To tap into the manifold for vacuum and boost readings, the custom designed and CNC machined billet aluminum Weistec Vacuum/Boost Adapter is included, simplifying boost reference installation. The included Weistec Silicone Turbo Charge Pipes each have a built in port for the Weistec Barbed Injector Body, allowing the use of two injectors for uniform injection and cooling. The combination of the cooling effects of methanol and the knock resistance of water result in significant gains(through improved cooling and octane) in horsepower and torque as well as reduced chance of heat soaking the intercooler system.

This system is a complete, bolt on system that can be installed with out any guess work or custom fabrication. Weistec has engineered and manufactured many of the components of this system to ensure a simple and straight forward installation that a universal kit simply lacks. The gains in performance and consistency make this system an essential upgrade for the M275 and M279 engines.


  • Reduced intake air temperatures
  • Increased knock/detonation resistance
  • Signifigant horsepower increase with tune
  • 4 Ply silicone charge Y pipe with integraded injector ports
  • Vacuum/Boost Adapter
  • Water/Methanol Controller with built in MAP sensor
  • Weistec CNC machined injector body 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 my vary from images)
  • Designed for 50/50 water and methanol mixture
  • Compatible with stock and upgraded turbochargers
  • All hardware and gaskets are included
  • Engine: M275
  • Mercedes-Benz C215 CL600 2003-2005
  • Mercedes-Benz C216 CL600 2006-2014
  • Mercedes-Benz C215 CL65 AMG 2004-2005
  • Mercedes-Benz C216 CL65 AMG 2006-2014
  • Mercedes-Benz W463 G65 AMG 2005-2018
  • Mercedes-Benz W240 Maybach 57 2005-2012
  • Mercedes-Benz V240 Maybach 62 2005-2012
  • Mercedes-Benz W463 Maybach G650 Landaulet 2017-2018
  • Mercedes-Benz A217/W222 Maybach S650 2017-2020
  • Mercedes-Benz W220 S600 2003-2005
  • Mercedes-Benz W221 S600 2006-2013
  • Mercedes-Benz W220 S65 AMG 2004-2006
  • Mercedes-Benz W221 S65 AMG 2007-2013
  • Mercedes-Benz W222 S65 AMG 2014-2020
  • Mercedes-Benz C217 S65 AMG 2015-2020
  • Mercedes-Benz A217 S65 AMG Convertible 2015-2020
  • Mercedes-Benz R230 SL600 2003-2011
  • Mercedes-Benz R230 SL65 AMG 2004-2011
  • Mercedes-Benz R231 SL65 AMG 2012-2020

Proposition 65

/!\ warningWARNING: Cancer and Reproductive Harm


Vehicle Engine Notes
Mercedes-Benz CL600

2005-2006, 2008-2014
Mercedes-Benz CL65 AMG

Mercedes-Benz G65 AMG

Mercedes-Benz Maybach S650

Mercedes-Benz S600

2005-2013, 2015-2019
Mercedes-Benz S65 AMG

Mercedes-Benz SL600

Mercedes-Benz SL65 AMG

What Is Weistec Engineering?

Based out of Orange County, California, Weistec Engineering is an industry leader in research, development, and design. While the company was only established in late 2010, founder Michael Weiss and his partner Steve Atneyel both have an impressive track record of working with some of the fastest and most powerful vehicles in the world. The duo were both engineers for major American OEM and aftermarket performance companies; Michael was involved with advanced engineering, while Steve specialized in computer calibration.

Michael Weiss and Steve Atneyel decided to branch out on their own and combine their expertise and experience. The pair were, and still remain, avid Mercedes enthusiast and realized that there was a huge gap in the market for a company dedicated to engineering state-of-the-art performance systems for cars powered by motors like the M156 and M159 AMG. Since its inception over a decade ago, Weistec has grown to provide customers with the highest level of satisfaction and value through unyielding tests and continuous improvements in Mercedes products and performance. 

What Does Weistec Offer?

Engineering and design are the two core services of Weistec Engineering. The Weistec team offers an array of services and capabilities thanks to the team’s combined experience from multiple fields. Whether you have a new idea or are looking to improve an existing design, Weistec can bring your concept to reality while protecting your vehicle’s design form and engineering function. Services include CAD, CAM, rapid prototyping, CNC machining, laser cutting and etching, casting, plastic injection molding, 3D laser scanning, and much more.

Weistec Engineering also offers a comprehensive line of products to the import and exotic market, covering vehicles such as Mercedes-Benz, Audi, Pagani, Alfa Romeo, BMW, McLaren, Ford, Aston Martin, and Maserati. No matter what type of upgrade you are looking for, Weistec has something for everyone when it comes to performance products, suspension parts, electrical components, interior/exterior accessories, and wheels/tires.

Weistec Engineering keeps nearly every aspect of its production process in house to guarantee only the highest quality. From conceptual 3D designs to in-house manufacturing and, ultimately, road and track testing, Weistec boasts relentless attention to detail on everything it offers. Specializing in computer-aided design and vehicle calibration, Weistec has the ability to manufacture quality products that are capable of withstanding even the most rigorous testing conditions. From OEM vehicle manufacturers to the aftermarket performance enthusiast, Weistec aims to deliver innovative solutions that address a wide range of client needs and desires. 

Find Weistec Parts at Vivid Racing

Vivid Racing carries an extensive lineup of Weistec products to suit all your needs and preferences. Our inventory is virtually endless with everything you could possibly need to upgrade your vehicle in terms of performance, power, handling, suspension, aesthetics, and accessories. If you cannot find what you are looking for above or need help choosing a product for your needs, please give us a call at (480) 966-3040. We will advise you on the possible options and walk you through the entire purchase process to ensure a hassle-free experience.

Weistec Limited Warranty

1. Warranty on Weistec Turbocharger Systems, Supercharger Systems, Exhaust Systems and Engine Accessories

12 month Weistec Limited Warranty. Valid 12 months from sales date with valid registration.The following exclusions apply to all Weistec Limited Warranties.

Weistec's limited warranties do not cover any of the following damages or items:
  • Damages to and/or failure of any non-Weistec component or equipment on a vehicle including, but not limited to, the engine, electrical system, transmission and differentials.
  • Damage caused by "Acts of God", normal wear and tear, or damage to a vehicle or engine caused by, tuning by others, collision and/or engine failure.
  • Any costs incurred for towing or downtime of the vehicle.
  • Any rental vehicle costs
  • Any labor costs to diagnose problems or to remove or replace the Weistec products; or any damage caused by the use of another company's product.
  • Any shipping costs.

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