For the BMW brembo 4-pots sport (F20-F87) front axle brakes.
N39S
N Series
N39S shares many properties with N35S but has a step higher initial bite and better performance while modulation is still very good. Also, this compound gives a quicker response and builds up the friction exceptionally well starting at cold temperatures. N39S has excellent
temperature resistance and will show low pad wear.
Specifications
Friction: 0.42-0.52µ
Heat levels: 0-850°C
These pads are made for motorsport/competition, but due to their temperature range, will also suit road cars.
Run-in process:
Make a hard stop from 100 km/h to a standstill and quickly accelerate back to 100 km/h 10 times.
The brakes must reach a temperature of 350 degrees in the discs or more to complete the process, otherwise more stops are required.
If this is not possible, 3 laps at about 80% pace on the track will also suffice, then check the temperature of the discs.
Only after the running-in procedure can the pads provide optimum performance.
These brake pads can squeak (to prevent this, the edges of the pads can be rounded).
When applying to used discs, we recommend inspecting for problems first and then coarse sanding (80-120 grit sandpaper) to remove old brake pad residue.
