I am thinking of upgrading the W205 C300 brakes to BBK. Options are:

1) C43 4pot front/1pot rear
2) C63s 6 pot front/1pot rear

Question is whether the slightly bigger C43 brake caliper and rotor (compared to standard C300) will make any difference and worth the effort?

On the other hand, will C63s 6pot front/1pot rear have too much brake bias on the front? I believe w204 C63 and other Mercs typically have 6/4 pots ? Welcome any views

 

if you dont track the car a ton, the c43 brakes will be more than enough for most drivers. they are the big 4 pot versions. the 6 pot c63 brakes are exact same size 14.2inch x1.4inch as c43 except due to caliper design i think the caliper is slightly lighter and the 6 pot pots are smaller than the 4 pot pots. The c63 still have a fixed 1 piston rear caliper but the disc is 14.2 x 1 inches compared to the 12.6x0.9 inch c43 rear.

The c63 s brakes jump to 15.4x1.4 inch fronts and same rears as c63. and the carbon ceramics are a whopping 15.8 inch x 1.5 with same rears again.

for the speeds a c300 can go the c43 brakes are more than enough in my opinion.





edit: keep in mind with the c43 or c63 brakes you will need 18 inch wheels minimum all the time. The c63s brakes need 19 inch wheels to clear.

 

That's great. So it seems the C63 brake is comparable or only marginally better than the c43 brakes. However, if money is no matter (lets just say ) Will the front 6/ rear 1 pot combination give too much bite in the front? Wonder why Mercedes went this way as compared to previous generations with 6 pots front and 4 pots rear which seemed more "balanced".