Just fitted the G series smaller 4 pot Brembo brakes on e92 m3.
Basically bolt-on, only modifications required are
2mm washer,
cut the dust shields from bottom side 2-3cm,
cut the brake pads from bottom side ~3mm.
I used the 7 series G11 740i 2017 unpainted calipers and painted black. Will but some sticker there aswell.
Exactly the same as the red/blue ones but much better price and easier to find.
Have to figure out the brake pads - for these calipers there are 2-3 different pads from the g 3series, 7series, x4.. Might find pads that dont require cutting.
~300$ in total
After few spirited drives i can already tell that the brakes bite much sharper and brake fade comes much later. Still need to do the ABS/DCS bleed procedure through inpa as sometimes they feel little bit mushy, bleeded without the procedure.
Also clears 18inch style 640m rims.
Did not weigh them but they are muchhh lighter than stock ones.