So here are my latest thoughts... I'm leaning towards getting the M Sport rear bumper and swapping out the diffuser with the M5 diffuser. However, will the M5 diffuser fit on the M Sport bumper? I like the M5 diffuser much more than the 550i diffuser. When I compare the 528i M Sport rear bumper compared to the M5 rear bumper on bmwusa.com, it looks like the same exact bumper with the only difference being the diffuser. So what I'll probably do is order the M Sport bumper with the quad setup and if I don't like the way it looks then I can always replace the diffuser with the M5 diffuser at a later point in time. I need to sleep on it, but I'm getting ready to make a purchase soon.
2013 528i xDrive Black Sapphire Metallic
35% Madico Onyx Tints
Painted Front Reflectors
Custom M Performance Grilles
M Performance V-Spoke 20" Wheels
18mm BMS Rear Spacers
M5 Style Spoiler
M Sport Rear Bumper with Painted Reflectors & M5 Diffuser
GTHAUS Meisterschaft Full Cat-back True Dual Exhaust 4x90mm GTC EV Controlled
Evolution Racewerks Catless Downpipe
BMS Stage 1 Tune (pending)
(Picture not up to date with current mods)
Last edited by JPetrillo; 03-02-2013 at 03:12 PM.