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Weistec M838T|M840T VTA Adapters McLaren 540 | 570 | 625C | 650S | 675LT | 720s | P1 2014+
$299.00

Exciting Clearance Alert!

Hey there! We’re thrilled to let you know that we have a brand-new item in stock and it’s currently on clearance. Just a heads up—clearance items are sold as-is and can’t be returned or exchanged. These items are typically older stock, returned parts, or gently used, and we’ll provide a detailed description of their condition.

Introducing the Weistec VTA Adapter

The Weistec VTA (Vent to Atmosphere) Adapter is your go-to solution for achieving that beloved "blow-off" sound many turbocharged vehicle enthusiasts crave. Designed specifically for the 3.8 and 4.0 Twin Turbo engines, this adapter offers a straightforward bolt-on installation. These engines come with electronically actuated bypass valves that quietly recirculate air back into the compressor inlet. With the Weistec VTA Adapter, you won’t have to worry about a check engine light since the factory valves remain in place, and there’s no need for tuning or ECU calibration.

Key Features

  • 100% Bolt-on solution
  • No check engine light
  • CNC machined aluminum for durability
  • Anodized to military specifications
  • Engineered and manufactured in the USA
  • Compatible with Engine: M838T

Fitment Compatibility

  • McLaren 540C (2016-2019)
  • McLaren 570GT (2017-2019)
  • McLaren 570S (2016-2019)
  • McLaren 570S Spider (2017-2019)
  • McLaren 625C (2015-2016)
  • McLaren 625C Spider (2015-2016)
  • McLaren 650S (2015-2016)
  • McLaren 650S Spider (2015-2016)
  • McLaren 675LT (2016)
  • McLaren 675LT Spider (2016)
  • McLaren P1 (2014-2016)
Proposition 65

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

Vehicle
2016-2019
McLaren 540
2016-2020
McLaren 570
2015-2016
McLaren 650S
2016
McLaren 675LT
2017-2021
McLaren 720S
2014-2016
McLaren P1

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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Adam R. Verified Customer   
04-16-25 - Arizona, United States

Easy quick

Recommend this Company
5 / 5
Jeffrey A. Verified Customer   
04-16-25 - New York, United States

great

Recommend this Company
5 / 5
Tyler R. Verified Customer   
04-16-25 - Iowa, United States

Great

Recommend this Company
5 / 5