EVOMS Diverter Valves (991 Turbo)


Designed to fit:

  • 2012 - 2016 Porsche 911 Turbo / Turbo S (991.1)
  • 2017 - 2019 Porsche 911 Turbo / Turbo S (991.2)

Product Details

EVOMS direct replacement diverter valve pair will eliminate the notorious "honking" sound commonly heard when the OEM valves have failed. Their valves will restore lost power and will hold more boost pressure than the stock units for added performance. In addition, they recover quicker than the OEM valves which allows for better spool after shifts. They designed their valves with a 90 degree vacuum port which allows for additional vacuum line clearance and a trouble free installation. The EVOMS Billet Diverter Valves for the 991TT come as a complete kit, including everything you need for installation.


  • Engineered out of Billet Aluminum
  • Stiffer Spring to Allow for More Boost Pressure
  • Successfully Tested over 1,000 Horsepower
  • Cheap Insurance for all Cars Ranging from Stock to Over 1,000 Horsepower
  • Available in Black Only
  • Lifetime Warranty



    About EVOMS

    Evolution: ev-o-lu-tion (noun) A gradual process in which something changes especially into a more complex form.  

    Mission: We exist to satisfy our customers’ addiction to speed and passion for high performance.  

    Philosophy: Engineer, manufacture and offer the highest quality performance components for an elite group of extreme individuals. Our cars are our passion, more than a means to get to and from work but an expression of who we are as people. An extension of our personalities: unique, aggressive, strong and powerful. We can help make each drive more enjoyable, more intense and less mundane. We can help transform your car from the ordinary into the extraordinary.

    Experience: We have over half a century of combined experience in automotive engineering, design, fabrication, racing and many other facets of the automotive industry. We drive and race the cars that we build components for. We have an extensive R&D and test program that ensures our components are held in the highest standards.

    Our Porsche race efforts help keep us on the cutting edge as we are constantly in search of that last ounce of power, a better “mouse trap” or ways to make the car handle or brake better. We share your passion, your dream and the never-ending pursuit of more speed and performance.