When you bring your vehicle to WestTuned Car Mechanic Center, you can rest easy knowing that your vehicle is in professional hands.
440i | 326 HP -> 0 HP
Westtuned develops precision ECU tuning software for the BMW 4 Series 440i, crafted to push your engine beyond factory restrictions. Our calibrations are built around real-world dyno data, delivering a smoother, stronger power curve without compromising engine reliability or daily drivability.
Our engineers develop every file using real-world data logging and dyno sessions, ensuring each Stage 1 calibration delivers consistent, repeatable power gains across a wide range of conditions and temperatures.
Our calibrations are compatible with both stock vehicles and those equipped with aftermarket hardware — intakes, intercoolers, exhausts and more — ensuring maximum performance at every stage of modification.
Choose Westtuned for:
Transform your BMW 4 Series 440i with professional tuning software from Westtuned and experience the power and responsiveness your engine was truly built for.
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