The RaggDoll RS1 Turbocharger is our original, track-proven performance upgrade for the Porsche 718 Cayman and Boxster 2.5L S & GTS (982) platform. Designed from the ground up to deliver instant response, factory-like drivability, and real-world usable power, the RS1 remains one of the fastest-spooling upgrades available for the 718 2.5L engine.
Unlike oversized turbochargers that sacrifice response in pursuit of peak dyno numbers, the RS1 is engineered to dominate where it matters most — midrange torque, fast spool, and consistent performance under load. Whether you’re carving canyons, daily driving, or pushing hard on track, this turbo delivers power you can actually use.
With proper supporting modifications, the RS1 is capable of 500+ wheel horsepower, while being intentionally optimized in the 440–high-400 whp range where efficiency, intake air temperatures, and reliability are maximized.
This is not a numbers-only turbo.
It’s a balanced performance solution.
The factory Porsche 718 2.5L turbocharger offers excellent response in stock form, but it quickly becomes a restriction as airflow demands increase through ECU tuning, intake upgrades, improved intercooling, and higher boost targets.
The RaggDoll RS1 Turbo Upgrade was developed to eliminate that restriction without compromising drivability.
Rather than chasing size for the sake of peak power, the RS1 focuses on improving overall efficiency — delivering stronger airflow, broader power delivery, and better thermal control across the entire RPM range. The result is a turbocharger that feels sharper everywhere, not just at redline.
This is a true performance upgrade — not an oversized compromise.
The RS1 retains Porsche’s factory variable geometry turbine system, allowing dynamic exhaust flow control for exceptional low-RPM response while still supporting increased airflow at higher engine speeds.
An upgraded compressor design increases airflow and efficiency without excessive shaft speed, helping reduce heat generation and maintain consistent performance under sustained load.
The RS1 is engineered as a complete system — balancing compressor flow, turbine efficiency, and boost control to ensure smooth power delivery, predictable tuning behavior, and long-term reliability.
The RS1 is ideal for Porsche 718 Cayman & Boxster 2.5L S and GTS owners who are:
This turbo is for drivers who value response, drivability, and consistency — not just peak dyno numbers.
Professional installation is recommended.
Custom ECU tuning is required to safely and effectively operate this turbocharger upgrade. Proper calibration is critical for correct boost control, drivability, and long-term reliability. Always consult your tuner prior to installation.
Upgraded intercooler, intake system, and custom ECU tuning. Additional fueling upgrades may be required depending on power goals.
All RaggDoll Series turbochargers are remanufactured to OEM specifications and tolerances unless a brand-new unit is requested.
Each compressor housing is refinished and laser-etched with RaggDoll Series identification to ensure authenticity and traceability.
RaggDoll Motorsports turbochargers are not mass-produced catalog parts. They are platform-specific performance solutions, developed through hands-on testing and real-world use on the Porsche 718 platform.
Built differently — because performance demands it.
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.
