The original factory software in your BMW has been engineered for emissions compliance and mass market appeal, leaving performance out of the equation. The N51 engine in the E82 128i, E90/E91/E92/E93 328i SULEV models is a detuned version of what was available in other models and software tuning is part of the solution to getting that power back.
Our Stage 2 software is for tuning a stock 128i/328i N51 SULEV or for very basic intake and exhaust mods. We call it Stage 2 to be consistent with our N52 software. The N51 engine has the same 3-stage manifold as the 330i and only software is holding it back. We tune the N51 engine for higher octane fuel. BMW deliberately de-tunes the car for lower octane that we have in the US. This naturally leaves some room for improvement if you only run 91 or higher octane fuel. We tune the ignition, camshaft, and VANOS values to optimize them for better fuel. We also adjust the fuel maps to match the more aggressive timing and remove or raise the artificial torque limiters. Our software produces more horsepower and torque and a smoother-running engine. We don't just tune for full throttle either - there is more torque available in the mid-RPM as well! Throttle response is also improved.
We have been partners with Epic Motorsports for BMW performance software for over ten years. They are one of the very best BMW ECU tuners in North America. Our custom performance tune for the 128i/328i combines these years of BMW performance tuning, racing and track events, and ECU tuning into this fantastic N51 software upgrade.
Our software is installed via the Engine Calibration Interface (ECI) and your Windows laptop (compatible with XP, Win7, Win8, and Win10). The ECI cable is included at this price. Read and email your stock file and a tuned file will be returned to you. This is better than off-the-shelf tunes that never look at your original software.
Notice of Emissions Non-Compliance. This software was developed and tuned on vehicles that retained all emissions controls. It is intended for vehicles with stock and fully functional emissions equipment. However, it has not been submitted nor tested for approval in California. Therefore, it is not legal for installation or use in California on any pollution-controlled motor vehicle. Some suppliers will not ship to certain states, requiring extra delivery time. We will advise you of any delays. Not legal for installation or use on any pollution controlled motor vehicle in any state, province, or jurisdiction governed by, or which has adopted, CARB or EPA regulations.
E82 / E88 (08-13) > 128i
E90 / E91 / E92 / E93 (06-13) > 328i
E90 / E91 / E92 / E93 (06-13) > 328xi