Quick Spooling. Big Power. Track and Dyno Proven.
*This listing is for a RaggDoll series turbo build using a brand new and complete Borg Warner turbocharger as a core.
The RaggDoll Rennen is the ultimate turbo upgrade for the Porsche 718 2.0L platform — engineered for quick spool and high liner torque, incredible midrange, and serious top-end punch. With over 50 lb/min of airflow and a torque curve designed to dominate, the Rennen delivers GT4 RS-chasing performance while maintaining everyday drivability.
Paired with our upgraded fuel system and my other RaggDoll supporting modifications, easily achieving 500 crank horsepower on pump gas has been dyno-proven — and with faster spool and higher efficiency than any comparable turbo on the market, you’ll experience a quick throttle response for the relentless power you receive.
RaggDoll Rennen Features
Designed for Real World Performance
The RaggDoll Rennen turbo was born from countless hours of R&D across dozens of cars, tunes, and track conditions. It was designed specifically to give 2.0L owners a turbo capable of not only keeping up with some of the modded 2.5L cars — but walking them on the track.
Expect a strong, linear torque curve and a turbo that’s as at home on canyon roads as it is at the track.
Our Proprietary Compressor and Turbine Pairing
We strongly recommend pairing the RaggDoll Rennen with the RaggDoll High-Flow Turbo Inlet to allow the turbo to breathe to its full potential.
Our Build Process
Every RaggDoll Series turbocharger is remanufactured to better-than-stock standards:
Optional: We also offer brand new BorgWarner units upgraded with RaggDoll wheels for customers who prefer 100% new components.
Why Choose RaggDoll?
From the moment you open the box, you’ll notice:
RaggDoll Turbochargers aren’t like the rest — because they aren’t built like the rest.
Top-shelf parts. Next-level engineering. Track-tested, street-proven performance.
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!
Built by enthusiasts, for enthusiasts. RaggDoll delivers high-performance parts, custom innovations, and expert-level support for serious drivers and tuners worldwide.
