When I get my Performance Grilles, I just bought these to try without pulling away the bumper cover.
http://www.ebay.com/itm/271290981789...S:3160&vxp=mtr
Looks like it worked here, so I'm thinking the same:
http://www.bimmerfest.com/forums/sho...d.php?t=662717
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2007 E92 328i 6MT-Space Gray/Black Dakota/Gray Poplar w/heated seats-PCD 4/27/07 (SOLD)
2009 E90 328i xDrive 6AT-Space Gray/Oyster Dakota/Dark Burl Walnut w/ZPP,ZCW,Xenons-ED 4/17/09 - Redelivery 5/30/09 (SOLD)
2014 E84 xDrive28i 8AT-Alpine White/Black Nevada/Silver Matte w/ZMV,ZLP,494 - DD 3/14/14 (SOLD)