Jcsportline Carbon Fiber Rear Diffuser fits BMW 2 Series M235I 2014-2017(Only fit M235I M Sport bumper) Fitment:This Rear Diffuser fits for BMW 2 Series M235I 2014-2017(Only fit M235I M Sport bumper) Made from 100% Grade-A Carbon Fiber Racing inspired aerodynamics and style Used by professionals in auto racing, drifting and drag racing Shipping:The Rear Lip Spoiler will be shipped by EMS, normally the shipping time is 5-10 working days. Please check the item and accessories in the package. Preparatory work(electric hand drill,3MM drill,screwdriver,screws.) Rise the car with lift,dismantle the screws on the bottom of the original diffuser and bumper and remove them. Aiming at the position where diffuser removed,press the clips and ensure diffuser assembly in place(if the clip is loose,can use a screw to fix it.) Install the bumper and the diffuser on the car as a whole by screw then the installation is complete.