Description
Unlock the performance potential of your BMW S55-powered M car with the CarBahn Performance S55 Big Turbo Upgrade. Designed for select BMW F-series M2 Competition, M2 CS, M3, and M4 models, this turbocharger upgrade system features newly manufactured turbocharger units engineered to deliver increased airflow, improved efficiency at higher engine speeds, and substantial performance potential.
Unlike rebuilt factory turbochargers, the CarBahn upgrade features new turbocharger assemblies, incorporating larger compressor wheels and housings, larger turbine wheels and housings, and a new high-performance exhaust manifold casting. These design improvements are intended to increase turbocharger flow capacity and efficiency at higher airflow demands.
By improving turbocharger efficiency, the system is designed to help reduce charge-air temperatures at high RPM compared with less efficient configurations. Lower charge-air temperatures can provide additional thermal headroom for increased boost when supported by appropriate engine calibration, fueling, cooling, and other supporting modifications.
CarBahn's turbocharger design prioritizes increased airflow while aiming to minimize turbo lag compared with many alternative high-performance turbocharger configurations. When paired with CarBahn Stage 3 engine software, the upgrade is intended to deliver substantial power gains with a predictable power delivery characteristic, while accounting for the limitations of the vehicle's drivetrain and supporting components.
The turbochargers incorporate upgraded billet compressor wheels, heavy-duty large-pad thrust upgrades, CNC machining, and high-speed VSR balancing. These features support the system's focus on precision manufacturing, rotating assembly balance, and high-performance operation.
With an estimated installation time of approximately 17 hours, the CarBahn S55 Big Turbo Upgrade is intended for performance builds seeking increased turbocharger capacity beyond the factory configuration.
Key Features & Benefits
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New Turbocharger Units: Supplied as new turbocharger assemblies rather than rebuilt factory units.
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Upgraded Billet Compressor Wheels: Designed to support increased compressor airflow and high-performance operation.
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Larger Compressor Wheels and Housings: Improve airflow capacity for demanding performance applications.
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Larger Turbine Wheels and Housings: Designed to support increased exhaust flow through the turbocharger system.
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New High-Performance Exhaust Manifold Casting: Included as part of the upgraded turbocharger design.
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Improved High-RPM Efficiency: Engineered to operate more efficiently at higher airflow volumes.
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Charge-Air Temperature Management: Improved turbocharger efficiency is intended to help reduce charge-air temperatures at high RPM.
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Increased Boost Potential: Lower charge-air temperatures may provide additional boost headroom when the engine setup and calibration support it.
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Reduced Turbo Lag Design: Engineered to deliver increased airflow with less lag than many competing high-performance turbocharger designs.
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Heavy-Duty Large-Pad Thrust Upgrade: Provides an upgraded thrust component for demanding turbocharger operation.
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CNC-Machined Components: Supports precision manufacturing and component consistency.
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High-Speed VSR Balanced: Turbocharger assemblies undergo high-speed VSR balancing.
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CarBahn Stage 3 Software Compatibility: Designed to work with CarBahn Stage 3 engine software for a coordinated performance upgrade.
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Estimated Installation Time: Approximately 17 hours.
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Installation Status: Listed as ready to install.
Performance & Tuning Considerations
The CarBahn S55 Big Turbo Upgrade is designed to increase turbocharger airflow and support higher-performance engine configurations. Achievable power output depends on engine calibration, fuel quality, fueling capacity, charge-air cooling, exhaust configuration, and other supporting modifications.
CarBahn Stage 3 engine software is identified as the intended software pairing. Confirm software compatibility, required supporting hardware, and any drivetrain limitations with the manufacturer or qualified BMW performance specialist before installation. Increased boost and engine output should remain within the limits of the engine, turbocharger system, and drivetrain.
Vehicle Fitment
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Make: BMW
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Models: M2 Competition, M2 CS, M3, M3 Competition, M3 CS, M4, M4 Competition, M4 CS, M4 GTS
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Vehicle Years: 2015, 2016, 2017, 2018, 2019, 2020, 2021
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Chassis: F87, F80, F82, F83
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Body Styles: Coupe, Sedan, Convertible
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Drivetrain: RWD
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Transmission: Automatic, Manual
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Engine: S55
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Product Type: Turbos
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Brand/Vendor: CarBahn Performance
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Part Number: CBS55-1019
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SKU: CBS55-1020
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Installation: Ready to Install
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Estimated Installation Time: 17 hours
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Recommended Software Pairing: CarBahn Stage 3 Engine Software
Compatible Vehicle Applications
BMW F87 M2 Competition and M2 CS
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2019 BMW M2 Competition F87 Coupe — S55 engine, RWD, Manual or Automatic transmission.
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2020 BMW M2 Competition F87 Coupe — S55 engine, RWD, Manual or Automatic transmission.
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2021 BMW M2 Competition F87 Coupe — S55 engine, RWD, Manual or Automatic transmission.
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2020 BMW M2 CS F87 Coupe — S55 engine, RWD, Manual or Automatic transmission.
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2021 BMW M2 CS F87 Coupe — S55 engine, RWD, Manual or Automatic transmission.
BMW F80 M3, M3 Competition and M3 CS
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2015 BMW M3 F80 Sedan — S55 engine, RWD, Manual or Automatic transmission.
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2016 BMW M3 F80 Sedan — S55 engine, RWD, Manual or Automatic transmission.
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2017 BMW M3 F80 Sedan — S55 engine, RWD, Manual or Automatic transmission.
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2018 BMW M3 F80 Sedan — S55 engine, RWD, Manual or Automatic transmission.
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2015–2018 BMW M3 Competition F80 Sedan — S55 engine, RWD, Manual or Automatic transmission, where applicable.
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2018 BMW M3 CS F80 Sedan — S55 engine, RWD, Automatic transmission.
BMW F82 M4, M4 Competition, M4 CS and M4 GTS
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2015 BMW M4 F82 Coupe — S55 engine, RWD, Manual or Automatic transmission.
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2016 BMW M4 F82 Coupe — S55 engine, RWD, Manual or Automatic transmission.
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2017 BMW M4 F82 Coupe — S55 engine, RWD, Manual or Automatic transmission.
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2018 BMW M4 F82 Coupe — S55 engine, RWD, Manual or Automatic transmission.
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2019 BMW M4 F82 Coupe — S55 engine, RWD, Manual or Automatic transmission.
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2020 BMW M4 F82 Coupe — S55 engine, RWD, Manual or Automatic transmission.
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2021 BMW M4 F82 Coupe — S55 engine, RWD, Manual or Automatic transmission, where applicable.
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2015–2020 BMW M4 Competition F82 Coupe — S55 engine, RWD, Manual or Automatic transmission, where applicable.
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2019 BMW M4 CS F82 Coupe — S55 engine, RWD, Automatic transmission.
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2016 BMW M4 GTS F82 Coupe — S55 engine, RWD, Automatic transmission.
BMW F83 M4 Convertible
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2015 BMW M4 F83 Convertible — S55 engine, RWD, Manual or Automatic transmission.
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2016 BMW M4 F83 Convertible — S55 engine, RWD, Manual or Automatic transmission.
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2017 BMW M4 F83 Convertible — S55 engine, RWD, Manual or Automatic transmission.
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2018 BMW M4 F83 Convertible — S55 engine, RWD, Manual or Automatic transmission.
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2019 BMW M4 F83 Convertible — S55 engine, RWD, Manual or Automatic transmission.
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2020 BMW M4 F83 Convertible — S55 engine, RWD, Manual or Automatic transmission.
Fitment Note: The supplied specifications list model years 2015–2021 across the F87, F80, F82, and F83 chassis. Actual production years differ by model, body style, and special edition. Confirm the vehicle's exact chassis, S55 engine configuration, transmission, and turbocharger compatibility before ordering. The supplied part number is CBS55-1019, while the SKU is CBS55-1020; verify the correct ordering reference with CarBahn before purchase.
Upgrade your BMW S55-powered M car with the CarBahn Performance Big Turbo Upgrade for increased airflow capacity, upgraded turbocharger components, and a performance-focused foundation for a properly calibrated high-output build.
