What is it Designed for true driving enthusiasts, these OEM upgrades bring the dynamics and enhanced performance of the iconic M4/M3 CSL and CS models into your vehicle. Experience the pinnacle of engineering with precision-coded software that optimizes key ECUs, delivering unparalleled responsiveness, sharper handling, and a more exhilarating drive. Technical Stuff This software can be applied to any G8X M2/M3/M4 and the software coded into the following ECU’s CSL/CS Transmission Flash - Responsive gear changes and a refined feel in Sport and Sport+ modes. The update also enhances exhaust burble characteristics, delivering the distinctive acoustic signature of the CS/CSL, ensuring every drive feels track-inspired and performance-focused CSL/CS Electronic Power Steering - Stiffened feel to steering for improved control and handling with more advanced power assist. CSL/CS Traction Control - More slip in MDM before power is cut/reduced and allows improved traction control setting and drift characteristics.CSL/CS Suspension - Enhanced damping for sharper cornering response and reduced body roll, delivering a more connected and agile driving experience Compatibility 2021+ G80/G81 BMW M3 2021+ G82/G83 BMW M4 2023+ G87 BMW M2 Requirements With this service we will require you to book the vehicle in question in with us for an appointment, once your order has confirmed, you will receive a booking confirmation email including address and appointment time selected by yourself