Your BMW 4 serie 440i 326hp deserves more than factory limitations, and OG Performance and Tuning is here to deliver just that. Our expert team utilizes state-of-the-art equipment and years of experience to safely unlock around 74 HP and 100 ft-lb of additional power. Our custom software adjustments ensure seamless integration with your car’s original systems, improving acceleration, mid-range punch, and top-end power. Every tune undergoes thorough dyno and real-world testing to ensure it matches our strict quality and safety standards, giving you confidence on every drive.