1Part Number: According to the original factory specifications, replacing reference OE number is Rpm?X3?Kit. More responsive, easier to install. 2Applicable Model: Turbo blow off valve kit, replacement for X3 Turbo Max Xrc Xmr Xrc R 2018?2019; Replacement for X3 Max 2017. 3Function: The purpose of a diverter valve is not just to sound great, it is designed to relieve pressure that builds on the load side of the system. 4High Performance: By installing a blower valve, you can improve boost response, extend turbo life, and of course get that fresh sound. 5Easy Operation: All you have to do is swap your main charge tube for the new silicone unit, plug in the new boost / vacuum nozzle, and plug in your blow off valve. 6Easy Access: This kit locates your new valve behind the driver's compartment access panel so it is easy to access right behind you. 7Long Service Life: Made of metal and rubber material for maximum durability. Original standard, direct replacement for the old or broken one.