Not to rain on your parade but I bought this same set off eBay for like $70 and they worked okay. I didn't like that there was no seal from the MAF sensor to the pipe/housing so I ended up buying another full set from another Manufacturer. Sorry but you should lower your price or include the entire intake setup for $200. I spent about that building my own intake originally and it takes the filters to the inside of the kidney grills like others have done.
https://www.ebay.com/itm/70mm-76mm-M...Cclp%3A2334524
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2011 550i (N63)
Upgraded 51mm turbos, Heatsync Stage 3 Flash, JB4 stacked, BMS WMI, Arm Charge Pipes, Heatsync Catless DPs, X-Pipe, Res Muffler Delete, xHP Stage 3 Trans Flash, Turbosmart Diverter Valves, 3.5 TMAPs, Oil Cooler, Heatsync Front Mounted Max Cool Intakes, Walbro LPFP and e40 mix rollin on Stance SF07 9x20 w/Toyo Extensa and 10.5x20 w/Toyo R888R.