RENNtech

+91 HP and +132 LB-FT is exactly the summer upgrade your C217 S63 AMG needs. ☀️

The RENNtech R1 Performance Package takes your Mercedes-AMG S63 Coupe to up to 696 HP and 801 LB-FT at the crank, unlocking serious power from the 5.5L V8 BiTurbo without sacrificing daily-driver comfort or reliability.

R1 Package Includes:
✅ RENNtech ECU Upgrade
✅ 3rd Gen Diverter Valve
✅ High-Flow Air Filters

With improved boost control, faster turbo response, and reduced turbo lag, the R1 Package delivers huge gains across the entire RPM range — making your S63 AMG sharper, stronger, and ready for summer.

Ready to wake up your C217 S63? This is where it starts.

The RENNtech Power Module ECU Upgrade for the Mercedes-AMG S63 E Performance W223 takes the M177 4.0L BiTurbo V8 with Electric Drive to an impressive 890 HP and 1,062 LB-FT of torque.

Engineered to enhance power delivery across the entire rev range, the RPM fine-tunes ignition timing, throttle response, and air-to-fuel ratios for sharper acceleration, stronger mid-range pull, and a more commanding drive.

Housed in a precision CNC-machined 6061 aluminum case, the module features pre-labeled wiring and connectors for a clean installation. A supplied bypass plug allows the vehicle to be returned to stock quickly, with the harness fully removable when needed.

Three Mercedes-Benz SLR McLarens in one place? At RENNtech, that’s not a coincidence — and it’s definitely not a one-time thing.

Owners trust the best with cars that deserve the best. From icons like the SLR to the most exclusive Mercedes-Benz performance machines, RENNtech is where legends come to be cared for, refined, and perfected.

🔥🚨New Product Alert 🚨🔥
The RENNtech Carbon Fiber Rear Wing for the Mercedes-Benz AMG GT C192 delivers enhanced rear-end stability, aggressive styling, and true motorsport-inspired functionality. Developed using advanced 3D scanning, CAD surfacing, CFD analysis, and 3D-printed prototyping, this AMG GT rear wing is built for precision, performance, and perfect fitment.
Crafted in Germany from premium pre-preg carbon fiber, finished in high-gloss UV-protective coating, and assembled with custom titanium hardware, this carbon fiber wing offers OEM-level fitment with no permanent vehicle modifications required.
For AMG GT C192 owners looking to elevate aerodynamics, performance, and exterior styling, the RENNtech Carbon Fiber Rear Wing is the ultimate upgrade.

Upgrade your AMG with the deep, refined sound it deserves🔥
RENNtech Stainless Steel Sport Mufflers for the X290 AMG GT 63 4-Door Coupe and W/S W213 E 63 AMG are handmade from T-304 stainless steel at RENNtech Headquarters in Stuart, FL.
Designed to reduce exhaust back pressure, improve exhaust gas flow, and deliver a lighter-weight performance upgrade, these sport mufflers keep unwanted cabin resonance out while bringing out the bold AMG sound you want.
Fully compatible with factory exhaust valves for Comfort, Sport, Sport+ and Race modes.
Save 15% now through 05/31.

Unlock more power from your Mercedes-AMG with the RENNtech ECU HHT (Hand Held Tuner) for the C209 CLK 63 AMG Black Series.
Engineered for serious performance, the RENNtech HHT delivers up to 534 HP and 485 LB-FT of torque, with gains of +34 HP and +20 LB-FT — all without removing your ECU.
The RENNtech HHT plugs directly into your OBD2 port, allowing you to switch between stock and tuned ECU programming anytime. Flash your vehicle in just minutes and reflash as often as you like.
With optimized ignition timing, throttle mapping, air/fuel ratios, rev limiter settings, and performance calibration, RENNtech ECU software helps unlock the true potential of your Mercedes-Benz AMG while maintaining daily-driver reliability.

For a limited time, save 10% on electronic modules like the RENNtech HHT through 05/31.

Upgrade your CLK 63 AMG Black Series with proven RENNtech performance.

This Memorial Day, we pause with respect and gratitude — and invite you to shop our Memorial Day Sale with savings of up to 15%.
Save 10% on electrical modules (HHT, HSM, EVM, RPM)
Save 15% on sport mufflers for AMG GT (C192), AMG SL (R232), AMG GT 63 4-Door (X290) and AMG E-Class 63 (W/S213)
Save $250 on RENNtech Protect

WIN A RENNTECH TUNED GT55 AMG for $50! MBCA’s Spring 2026 raffle is at full throttle, selling raffle tickets to win a RENtech-tuned Mercedes-AMG GT 55.
Founded in 1989, RENNtech has spent 35+ years pushing Mercedes-AMG performance beyond factory limits. This GT 55 is tuned to an OEM+ level of quality with RENNtech’s RPM ECU tune, the 4.OL BiTurbo V8 M177 engine gains +90HP and +82 LB-FT through modified ignition timing, optimized throttle mapping, and precision-dialed air-to-fuel ratios. The dyno doesn’t lie - 489HP becomes 579HP, and 582 LB-FT climbs to
664 LB-FT at the crank. RENNtech’s Exhaust Valve Module opens up your factory exhaust system’s valves to 100% open 100% of the time. More torque. Earlier delivery. Stronger pull.
One car. One winner. No MBCA membership required. Your $50 ticket could put you in the driver’s seat of one of the most legendary tuned AMGs on the road. Grab your ticket now at mbca.chance2win.org. Open to U.S. citizens 18 and older where valid. Tickets are available for a limited time.

Allow us to introduce: RENNtech Protect 🙌
Vehicle Service Contracts for nearly all Mercedes-Benz models we tune. Protect your investment with coverage backed by the same confidence we put into our engineering.
Choose the plan that fits your drive:
RENNtech Protect Powertrain
Essential coverage for key components that keep your vehicle moving. Eligible vehicles up to 10 years old and 125,000 miles.
RENNtech Protect Comprehensive
Broader peace of mind for Mercedes-Benz owners who want enhanced protection. Eligible vehicles up to 10 years old and 75,000 miles.
Coverage options range from 12 months / 12,000 miles up to 72 months / 72,000 miles.
Sign your contract within 5 days and receive $250 off your coverage.
Give your Mercedes-Benz the protection it deserves. Contact RENNtech today for eligibility, pricing, and plan details.

Upgrade your Mercedes-AMG with the unmistakable sound, performance, and craftsmanship of RENNtech. Engineered specifically for the Mercedes-AMG R232 SL 55, SL 63, C192 AMG GT 55, and AMG GT 63, our RENNtech T-304 stainless steel sport mufflers deliver a sharper, more aggressive AMG exhaust note while maintaining full compatibility with the factory Mercedes-Benz exhaust system.
For a limited time during our Memorial Day Sale, you can save 15% on this high-performance AMG exhaust upgrade.
Designed for drivers who demand more from their Mercedes-AMG, each RENNtech sport muffler set is built to reduce exhaust back pressure, improve exhaust gas flow, and enhance cylinder scavenging. The result is stronger performance, improved responsiveness, and a more engaging driving experience behind the wheel of your AMG SL or AMG GT.
Factory exhaust valves remain fully functional, allowing seamless use of Comfort, Sport, Sport+, and Race mode settings. Whether you want refined cruising or a more dynamic Mercedes-AMG performance exhaust sound, RENNtech sport mufflers give you the flexibility to enjoy both.
Each muffler set is also lighter than the factory units, making it an ideal upgrade for Mercedes-Benz and AMG enthusiasts who want improved sound, performance, and weight savings without compromising factory functionality.
Handmade at RENNtech Headquarters in Stuart, Florida, every RENNtech AMG sport muffler set reflects the precision engineering, premium materials, and craftsmanship trusted by Mercedes-Benz performance enthusiasts worldwide.