OK, there is a bit of a confusion here: the brake bulbs - the OP lists H21W, while some of the other posts including the Sylvania list above have it as W16W.
Why ? Or it is the the W16W is actually the tail light not the brake but it's too common to call it "brake", and the H21W is the correct brake bulb ?
328i Sports Pkg, Hankook Ventus V12 (non-RFT)
. Wavetrac LSD + M3 diff fr bshgs
. Short Shifter + ZHP M weighted shift knob, CDV delete
. M3 subframe bushings + f&r sway bars + control arms. Meyle rear toe arms
. BMW Perf: springs + v1 dampers