959 HP Stage 2 Performance Controller | BMW G90 & G99 M5

STAGE 2 IS HERE FOR the G90 M5 Performance Gains Horsepower Stock: 778 HP Tuned: 959 HP* Torque Stock: 834 TQ Tuned: 1,013 TQ* *Calculated Flywheel Power with 100 octane measured at the CarBahn San Jose Dynamometer 100 Octane Tuned Calculated Flywheel Power: 959 HP / 1,013 lb-ft +181 HP / +179 lb-ft Measured Wheel Power: 787 HP / 831 lb-ft +149 HP / +150 lb-ft 93 Octane Tuned Calculated Flywheel Power: 909 HP / 963 lb-ft +131 HP / +129 lb-ft Measured Wheel Power: 746 HP / 790 lb-ft +108 HP / +106 lb-ft CarBahn Stage 2 Performance Controller – BMW G90 & G99 M5 The G9X M5 marks a bold new chapter in BMW M performance—fusing electrified torque with brute V8 power in a way no M car has before. But even with all that innovation, there’s more lurking beneath the surface. The CarBahn Stage 2 Performance Controller is your key to unlocking it. Meticulously engineered by tuning legend Steve Dinan, this plug-and-play module delivers an astonishing increase in performance—without altering your factory ECU or compromising long-term reliability. On 100 octane fuel, we’ve measured a blistering 959 flywheel horsepower and 1,013 lb-ft of torque, transforming the already formidable M5 into a supercar-slaying monster. Whether you're chasing tenths at the track or simply demanding more from every on-ramp, the Stage 2 Controller brings out the car BMW engineered but left in reserve. Highlights: Up to 959 Flywheel HP / 1,013 lb-ft (on 100 octane) Plug-and-Play Simplicity: Installs in under an hour, fully reversible, no ECU flash required Daily Driver Friendly: Smooth at low speeds, savage under throttle Future-Proof Engineering: Compatible with upcoming CarBahn upgrades With demand for the G90 M5 surging and its place in M history already sealed, this controller ensures yours won’t just be another fast car—it’ll be the car that everyone remembers. Control Your Tune Anytime, Anywhere With the App, adjusting your octane map is as easy as tapping your screen. Whether you’re running 91, 93, or 100 octane, you can instantly switch performance profiles to match your fuel—no tools, no laptop, no hassle. Once paired to your controller’s serial number, the app remembers your settings so you can set it and forget it—until you decide to change fuel grades. Just open the app, tap your desired map, and enjoy optimized performance in seconds. ✅ Fast Bluetooth pairing ✅ VIN-locked security ✅ Supports 91 / 93 / 100 octane switching ✅ Available for iOS and Android ✅ App updates add new features and compatibility   About our Controllers The CarBahn Performance Controller (CPC) is an easy-to-install Controller that significantly boosts the turbocharged cars' horsepower and torque. This plug-and-play unit offers selectable maps, which can be accessed through a smartphone application via Bluetooth. To access this app, you must download them from either the Apple App Store or the Google Play Store. The maps are specifically designed to optimize performance based on different octane fuel levels. You have the flexibility to choose between 91, 93, and 100 octane options. Additionally, CarBahn offers an optional powertrain warranty for all their products, including the CPC. Emissions Legality: Let us address the topic of removing the catalyst, commonly achieved through the utilization of downpipes. Our rigorous testing regimen involved conducting consecutive dyno runs with and without the catalyst, and the observed power gain was significantly smaller than commonly touted, typically around 2%. Nevertheless, it is important to acknowledge our shared responsibility towards environmental preservation, as clean air is vital to our well-being. Furthermore, obtaining the necessary emissions certifications without a catalyst is a daunting task and, from a legal standpoint, it is considered an infringement. About Steve Dinan: With an illustrious career spanning over four decades, Steve Dinan stands as an authority in streetcar turbo tuning. Under his leadership, our team has triumphed in three prototype racing championships and secured two overall victories at the esteemed 24 Hours of Daytona in collaboration with Chip Ganassi Racing. Steve Dinan's unparalleled expertise solidifies our claim as the leading force in tuning high-performance engines.