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Thanksgiving Deal Anti Surge Valve / Water-methanol Injection System, M157 M278, Non-suv / Abc + Gift Included [EG0BAcyn]

$131.99 $422.99 -69%

Comprehensive Engine Enhancement for Mercedes M157 and M278 The Weistec ASV/WM Injection System is a groundbreaking upgrade for Mercedes-Benz vehicles equipped with the M157 or M278 engines, excluding SUVs. This innovative system combines two essenti

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Thanksgiving Deal Anti Surge Valve / Water-methanol Injection System, M157 M278, Non-suv / Abc + Gift Included [EG0BAcyn]

Comprehensive Engine Enhancement for Mercedes M157 and M278

The Weistec ASV/WM Injection System is a groundbreaking upgrade for Mercedes-Benz vehicles equipped with the M157 or M278 engines, excluding SUVs. This innovative system combines two essential components: the Weistec Anti Surge Valve (ASV) and the Water/Methanol Injection (WMI) System. The ASV effectively mitigates compressor surge, which can damage turbochargers, while the WMI System cools the engine and enhances performance. With its bolt-on design and comprehensive package, this system is a must-have for those seeking peak engine efficiency and power output.

Advanced Features and Specifications

The Weistec ASV/WM Injection System boasts a variety of advanced features. The ASV operates via engine vacuum, opening to vent compressed air when the throttle closes, thus preventing backflow and compressor stalling. The WMI System includes a progressive controller with a built-in MAP sensor, ensuring smooth and seamless operation. The system's turbo charge pipes have built-in bungs for two injectors, promoting uniform injection and cooling. This comprehensive setup is designed for 50/50 Water and Methanol mixture, compatible with stock, W.3, and W.4 turbochargers. Key features include reduced intake air temperatures, increased knock/detonation resistance, and up to 100 HP gain, making it an essential upgrade for the M157 engine.

Performance and Practical Applications

The Weistec ASV/WM Injection System is not just a performance enhancer; it's a practical solution for daily driving and racing scenarios. Its benefits are multifaceted, ranging from improved engine cooling and knock resistance to increased horsepower and torque. This system is designed for easy installation, requiring no guesswork or custom fabrication. The trunk-mounted 2.25-gallon tank, with its racing cell cap and integrated pump mount, provides a hidden installation option, perfect for those who desire a sleek and efficient setup. Whether you're a daily driver or a performance enthusiast, the Weistec ASV/WM Injection System is tailored to enhance your Mercedes-Benz's engine performance, ensuring a thrilling driving experience.

What Our Customers Say

January 28, 2026

Absolutely no complaints!

An excellent product overall. An A+++ rating.

- Bethan B..

January 28, 2026

Absolutely no complaints!

It works like magic, every single blessed time.

- Dudley D..

January 28, 2026

Absolutely no complaints!

A purchase I am incredibly proud to own.

- Soren V..

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