Ultimate Blow-Off Valve Upgrade for Porsche 718
The RaggDoll Motorsports Blow-Off / Diverter Valve is a dual-configuration turbo pressure control upgrade for the Porsche 718 Cayman and Boxster platforms, designed to replace the factory electronic diverter valve with a faster-acting, higher-flow solution. Built for tuned street cars, upgraded turbo builds, and track-driven setups, it delivers improved boost control, sharper throttle response, and long-term reliability—while allowing you to choose between recirculating OEM-style operation or a true vent-to-atmosphere sound.
The factory 718 diverter valve is designed for stock boost levels, quiet operation, and emissions compliance—not aggressive boost targets or repeated high-load cycling. As boost pressure and turbo response demands increase, the OEM valve can struggle with slower response, inconsistent sealing, and reduced durability over time.
The RaggDoll Blow-Off / Diverter Valve solves these limitations with a robust mechanical design that reacts instantly to throttle changes, maintains stable boost control, and withstands high boost without leakage or hesitation.
Ideal for tuned 718s, upgraded turbo builds, ethanol setups, and track cars looking for reliable boost control, faster response, and customizable sound characteristics.
Professional installation is recommended. No tuning is required for basic operation, though tuning is recommended when paired with higher boost targets or upgraded turbochargers to fully optimize throttle response and boost behavior.
Optional/required extras: ECU calibration (for high-boost setups), upgraded turbo inlet, intake system
The RaggDoll Blow-Off / Diverter Valve is engineered to integrate seamlessly with high-flow turbo inlets, upgraded intercooling, and performance exhaust systems—ensuring stable boost control as airflow and power levels increase.
RaggDoll Motorsports components are engineered solutions—not cosmetic upgrades.
Reliable boost control.
Sharper response.
Track-tested, street-proven performance.
Built differently—because control is everything when boost goes up.
Liza & most of the time Vince is amazing...lol. Nah, kidding, these guys are awesome folks to deal with. I purchased their Stage 2 turbo, turbo inlet, intercooler, engine tune, and high pressure fuel pump for my 2018 2.5L Boxster GTS and they're products and service have been top notch throughout the entire process.
Raggdoll Motorsports set up two dyno sessions for my Porsche Turbo S. The Porsche touts a 4.0-liter built engine and head work facilitated by Sam at ByDesign. Also has the XR ByDesign turbo kit with all the supporting mods. The first session the PDK kept transitioning out of manual mode. During the second session a boost leak at the throttle body boot ended the session early. We managed 812 hp on a Mustang dyno at only 20 psi of boost.
The people behind RaggDoll Motorsports have been in the game for a very long time and really know their stuff. They have a passion for modifying cars and are enthusiasts before anything else.
I purchased a RENNEN turbocharger for my 718 T. I had a special request, which was to get the turbine housing coated with Swain Tech white lightning thermal barrier coating and RaggDoll accommodated without hesitation even though it was something new for their team.
Hey All! Shout out to Liza and @Raggdolls718. Amazing customer service, product knowledge and a top quality product. Liza went out her way to accommodate my tight timeframe and the level communication and level of detail shared was amazing.
I purchased the Raggdoll Series One turbocharger upgrade and the turbo inlet upgrade from RMS for my Porsche 718 Cayman GTS and was very pleased with both the products and the customer service from RMS!
Engineered for the 718 platform, trusted worldwide. RaggDoll delivers high-performance parts, custom turbo innovations, and expert-level support for Porsche 718 drivers and tuners—from Las Vegas to Germany, Hong Kong, and beyond.
