Not to be a little bitch or anything, but these are only $3.60ea from BMW. I just placed an order for one of each. Kinda nice, they're actually cheaper now, were $4 ea when I got my first set a couple of years ago...
https://www.shopbmwusa.com/Product/5...SSORTED-COLORS
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1and1
135i - E82.N54 2009 BSM - MHD / xHP / DCI, PR CP & 7.5" Race IC / N55 mid & Borla
. . WL RSFI, Koni, Eibach & Dinan CP's, M3 CA's / EBC Red's & Firehawk 500's
X1 - E84.N20 2013 MGM - JB4 - The Wife's, now with new turbo & ewg