Porsche 718 Cayman & Boxster Turbocharger Upgrade – RaggDoll Rennen HF (2.0L Base & T, 2017–2024) - RaggDoll Motorsports
Core Requirement (Required)
Add High Temp Ceramic
Description
RaggDoll Rennen Turbocharger
For Porsche 718 / 982 Cayman and Boxster 2.0L (Base & T Models)
Big Power. Track and Dyno Proven to hold tq like nothing else out there.
The RaggDoll Rennen is the ultimate turbo upgrade for the Porsche 718 2.0L platform —
The Rennen RHF was engineered to give the 2.0 Cayman Boxster what it’s missing most “torque” and not jist more of it but it’s liner incredibly through the midrange to high RPM, with 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 it easily achieve’s 500 crank horsepower (420 whp) on pump gas dyno-proven many times over the with more torque and power than any other comparable turbo on the market can make… if you want to experience relentless and what feels like endless power to every shift the RaggDoll RHF is the turbo for you.
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RaggDoll Rennen Features• True Plug-and-Play: Direct bolt-on with no modifications needed.
• Advanced Compressor wheel Design: Maximum flow and efficiency for a broader torque powerband.
• High-Flow Turbine Wheel: Optimized for quick spool and strong top-end.
• OEM BorgWarner Quality: Built around genuine BorgWarner cartridges and housings for durability and reliability.
• Inconel Turbine Wheel: Rated for 1050°C (1922°F), handling extreme exhaust temps without compromise.
• Cooler Intake Temps: More airflow at less boost = less heat for easier IAT control.
• Predictable, Consistent Boost: No surprises — smoother, faster, and more linear response than other aftermarket turbos.
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Designed for Real World Performance
The RaggDoll Rennen RHF 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.
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Our Exclusive Compressor Wheel
• Proprietary, advanced high-flow design
• Perfectly matched to the highest-flowing turbine wheel available
• Unlocks spool and power previously thought unattainable for the 2.0L Porsche platform
• We highly recommend pairing the Rennen with our RaggDoll High-Flow Inlet for maximum performance — the Rennen needs to breathe!
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Our Build Process
Every RaggDoll Series turbocharger is remanufactured to better-than-stock standards:
• Fully disassembled, cleaned, and inspected
• Precision machine work as needed to accommodate upgrades
• Turbine and compressor wheels individually balanced, then fully assembled and VSR-balanced at 250,000+ RPM
• All-new cartridge internals: bearings, seals, thrust components
• Laser-etched RaggDoll branding for authenticity
• Includes a new exhaust housing gasket
• Backed by a 1-Year Unlimited Mileage Warranty
Optional: We also offer brand new BorgWarner units upgraded with RaggDoll wheels for customers who prefer 100% new components.
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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.
Engineering Notes
Why the RaggDoll Rennen HF Is the Most Advanced Turbo Upgrade for the Porsche 718 2.0L Platform
RaggDoll Rennen RHF Turbocharger
Proven +160 WHP Over Stock on a Dynojet
The RaggDoll Rennen RHF Turbocharger was engineered for enthusiasts who want factory-like drivability with dramatically increased performance. By combining advanced compressor and turbine aerodynamics with optimized turbine housing flow, the RHF delivers exceptional spool, a broad torque curve, and impressive top-end power without sacrificing too much responsiveness.
The Power You Feel
Peak numbers are impressive, but the real story is what happens through the mid-range — the RPM range where you spend most of your time driving.
Approximate Dyno Comparison
| Engine RPM | Stock | Rennen RHF | Gain |
|---|---|---|---|
| 3,500 RPM | ~185 WHP | ~225 WHP | +40 WHP |
| 4,000 RPM | ~220 WHP | ~330 WHP | +110 WHP |
| 4,500 RPM | ~235 WHP | ~355 WHP | +120 WHP |
| 5,000 RPM | ~255 WHP | ~360 WHP | +105 WHP |
| 5,500 RPM | ~255 WHP | ~395 WHP | +140 WHP |
| 6,000 RPM | ~288 WHP | 448 WHP | +160 WHP |
Mid-Range Torque
The torque increase is just as impressive.
- Around 4,000 RPM, the RHF is already producing approximately 340–350 lb-ft, while the stock turbo is closer to 280 lb-ft.
- By 5,800 RPM, the RHF reaches 398.8 WTQ, compared to the stock turbo's 290.8 WTQ — an increase of over 108 lb-ft.
What This Means on the Street
The Rennen RHF doesn't simply make more peak horsepower — it transforms the entire powerband.
- Over 100 additional wheel horsepower by just 4,000 RPM.
- Over 120 additional wheel horsepower through the heart of the powerband.
- Nearly 140 extra wheel horsepower around 5,500 RPM.
- 160 additional wheel horsepower at peak.
This is why the car feels so much faster in real-world driving. Instead of waiting until redline for the power, the RHF delivers a massive increase through the entire acceleration curve, making every gear feel stronger from corner exit to the top of the rev range.
"The Rennen RHF isn't just a 448 WHP turbo — it's a turbo that adds over 100 wheel horsepower through most of the usable powerband."
Core Policy
No core charge required.* We don't charge a core deposit or core fee. We do ask that once you receive your new turbo, you ship your original unit back so we can keep cores on hand for the rest of the community. RaggDoll Motorsports covers all return shipping and any applicable tariff fees.
*Keeping a healthy core supply is how we keep this platform growing — every returned core helps the next 718 owner get on boost faster.
Find the Right Turbo
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Build Knowledge
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