I went with VRSF, and had to invite the Hulk over to help me force them into place. Once they finally seated, they are fine, but it took a lot to get them into place. I suggest buying the guys used set of AA ones in the classifieds or go with the Ultimate Racing ones...
FS: E70 X5M Active Autowerks downpipes
https://www.xbimmers.com/forums/show....php?t=1553988