RENNtech EVM | Exhaust Valve Module | CLA - A - GLA | MY2020+

(1 review) Write a Review
14.00 (in)
5.00 (in)
8.00 (in)
Minimum Purchase:
1 unit
Maximum Purchase:
5 units

EVM - Exhaust Valve Module (Remote Controlled)


Mercedes-Benz and AMG cars equipped with factory exhaust valves, with or without a center console button to open or close them, the factory settings do NOT allow the valves to fully open unless certain speed and/or RPM have been reached. For example, while cruising the exhaust valves will never fully open!


By pressing Button 1 on the remote control, RENNtech’s Exhaust Valve Module (EVM) allows you to open the exhaust valves 100% at all times. If you wish to go back to factory settings simply press Button 2. This gives you complete control over the exhaust valves regardless of speed, RPM or driving mode, adding sound and rumble to your car.

Advantages of RENNtech’s EVM:

  • Activation completely independent regardless of drive mode
    • Override your cars factory exhaust flap setting with the push of a button.
  • EVM does not engage with CAN-Bus
    • No interference with any control units.
    • Software updates do not interfere with the functionality of the EVM.
  • Plug and Play with original plugs
    • No cutting wires, no damage to factory cables, fully reversible.
  • Made in Germany



  • 1 x Exhaust Valve Module
  • 2 x Remote Controls (Button 1 fully open, Button 2 back to factory)
  • Wiring harness (model specific)
  • Installation manual



  • C118 - CLA Coupe
    • CLA250 
    • CLA35 AMG
    • CLA45 AMG | MY2019+
  • W177 - A-Class
    • A250 
    • A35 AMG
    • A45 AMG | MY2019+
  • H247 - GLA SUV
    • GLA45 AMG | MY2019+
  • X247 - GLB SUV
    • GLB35 AMG
  • W205 - C-Class Sedan
    • C300 | MY2019+



  • *Before Placing Order, Confirm If Your Car Is Equipped With Factory Exhaust Valves*
  • For extra convenience the EVM is programmed so once the flaps are fully opened they will stay that way even when the car is turned off and restarted later hence no need to press button 1 over and over every time you start the car. It will ONLY go back to factory setting by pressing button 2.
  • No special tools or modifications required for installation
  • The RENNtech EVM is placed in the trunk, no hard wiring necessary - Plug'n'Play solution.


  • 4
    W177 A45S EVM

    Posted by Cary Noah on Dec 3rd 2021

    Enjoying the difference the EVM makes in RAce mode. Not much difference in Comfort or Sport a bit deeper resonance with the valves opens. However, you really notice the cracks and pops with high Rev changes…before I would get 2-3 pops now 6-7. Huge difference. Don’t need to upgrade the exhaust with the Renntech EVM. It really helps offset the control the ECU has and unleashes the full potential of the stock A45S exhaust system. Only downgrade was shipping cost. $200 from US to Singapore is expensive; but a bit offset by the Black Friday sale.