991 & 981 Boxster/Cayman


“Instantly, that motor kicks in, boosting the native engine’s horsepower and torque by roughly 50 percent and giving me an idea of how Popeye feels after gulping spinach.”
Wired Magazine

Currently available for Porsche 911 and Boxster / Cayman mid-2012 and newer (991 and 981 series). This includes 991 C2, C4, S, Turbo, and GT3 cars as well as 981 Boxster, Cayman and GT4 cars.

Installation slots are currently being scheduled.

The Vonnen system is $75,000 installed, including parts and labor.

Pricing does not include the actual car, transport to or from our facility, sales tax, duties, or additional products and services you may elect.

“And unlike the speed that could be generated from a pair of turbos, VSD’s acceleration is immediate.”

911, 964, 993



We are in development for air-cooled Porsche 911 cars ranging from 1965 to 1998. Availability is first-half 2019.

996, 997, 986 & 987 Boxster/Cayman


Call to discuss your specific fitment.

Please use the form below to initiate a conversation about installation in your vehicle.
If you prefer a phone conversation feel free to call us at 408-982-5629. We’re open Mon-Fri from 8a-5p PST except major US holidays.
We’re located at 625 Nuttman Street in Santa Clara, CA 95054

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