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Weistec Water|Methanol Injection System McLaren 720S 2018-2019
$2399.00

Upgrade Your McLaren with Weistec's Water/Methanol Injection System

The Water/Methanol injection system has been a trusted companion in various applications for decades. Initially designed to minimize engine knock while boosting power in aircraft engines, it soon found its way into the motorsports world, proving to be a game-changer for turbocharged engines. Now, with the Weistec Water/Methanol Injection System, you can experience these remarkable benefits firsthand.

Smooth Operation with Advanced Technology

This system comes equipped with a Water/Methanol Controller that features a built-in MAP sensor. What does that mean for you? It means a progressive controller that gradually ramps up injection as your boost builds, ensuring a smooth and seamless performance every time you hit the gas.

Enhanced Cooling and Performance

The Turbo Charge Pipes included in the system are designed with built-in bungs, allowing for two injectors to provide uniform injection and cooling. The combination of methanol's cooling effects and water's knock resistance leads to impressive gains in horsepower and torque, while also reducing the risk of heat soaking your intercooler system.

Easy Installation

This complete, bolt-on system is designed for hassle-free installation—no guesswork or custom fabrication required! Weistec has carefully engineered and manufactured many components to ensure that you can get your McLaren Twin Turbo V8 engine upgraded without a hitch.

Key Features

  • Reduced intake air temperatures
  • Increased knock and detonation resistance
  • Up to 80 HP gain
  • Weistec Vacuum/Boost Adapter
  • Water/Methanol Controller with built-in MAP sensor
  • Dual Weistec CNC machined injector bodies with built-in check valves
  • Small, medium, and large quantity injection nozzles included for versatile configurations
  • Trunk-mounted 2.25-gallon tank with racing cell cap and integrated pump mount
  • High-quality quick disconnect fittings
  • Designed for a 50/50 water and methanol mixture
  • Compatible with stock and W.3 turbochargers
  • All necessary hardware and gaskets included
  • Engine: M840T

Fitment

  • McLaren 720S (2018-2019)
  • McLaren 720S Spider (2019)

Check It Out!

Proposition 65

WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
2018-2020
McLaren 720S

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.

We're currently collecting product reviews for this item. In the meantime, here are some company reviews from our past customers sharing their overall shopping experience.

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Aaron M. Verified Customer   
04-02-25 - Colorado, United States

quick and easy

Recommend this Company
5 / 5
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04-02-25 - Ohio, United States

Product was shipped extremely fast. It was in stock and I did not have to wait.

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04-02-25 - Arizona, United States

Parts for my LandCruiser vary far and wide.

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