Trunk Shock, BMW - F06 640i 650i M6 Gran Coupe (2014-2019)

This part is listed by BMW as BMW part number 51247360583 (51-24-7-360-583) and is described as Genuine BMW Trunk Shock for F06 640i, 650i, M6 Gran Coupe (2014-2019). 

Fits left or right. Sold individually.

This is a Genuine BMW trunk shock with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.