31 231299KT Bilstein B6 Performance Damptronic Shocks & Struts Kit Bilstein B6 Performance DampTronic Suspension Shock Absorber Rear 20 BMW 3 Series G20 2018> Bilstein B6 Damptronic B6 Performance Shocks Bilstein B6 Damptronic Debut! A Perfect Replacement For BMW EDC Bilstein B6 (DampTronic) 2015 BMW M3 M4 Front Left Monotube Strut. Bilstein B6 Performance (DampTronic) Dampers for the 2015 2020 BMW M4 are a performance upgrade to OE Dampers designed to be paired with OE factory springs. All of the active features of the factory electronic suspension, along with the factory controls, will be retained with the installation of these Dampers. Each damper is rigorously tested for quality that meets or exceeds OE standards and features application specific valve settings with a monotube design to bring out the best handling performance of a vehicle. B6 Performance (DampTronic) Dampers will deliver improved safety and handling performance in a package compatible with factory electronic damping control. Standard Features Perfectly adapted to suit series production electronic adjustment systems Ability to switch rapidly from comfort to sport setting Marked improvement in safety and performance with additional spring changes Specifications Part Number 26 245591 Part Name Shock Absorber Vehicle 2015 2020 BMW M4 UPC 651860771199 Boot Included No Finish Yellow Paint Internal Design Monotube Lower Mount Type Eye 12. 1 mm Segment Tuning Series B6 Performance (DampTronic) Spring Seat Included No Upper Mount Type Stem Notes With Electronic Suspension Vehicle Fitment 2015 BMW M4 2016 BMW M4 2017 BMW M4 2018 BMW M4 2019 BMW M4 2020 BMW M4