A Brembo GT-S big brake system built for the BMW 428i xDrive (excluding M-Sport Brakes) (F32 / F33), 2014 to 2016, front axle. The discs are 355x32mm 2-piece.
GT|S calipers are machined from billet aluminium and nickel finished, using the same approach Brembo takes with its Formula 1 and NASCAR calipers. They carry racing style piston radiators and recessed dust seals.
Six piston caliper, the usual choice for a performance saloon or coupe front axle.
Disc face: available cross-drilled or Type 3 slotted. Type 3 slots are the pattern Brembo uses in professional motorsport. They give a strong initial bite and keep the pad face clean as it beds in.
What is in the kit: 6 piston aluminium calipers, 355mm 2-piece discs with bells, Brembo pads, caliper mounting brackets, braided brake lines and the fitting hardware. Contents vary slightly by application, so check the part number against the list below.
Part numbers
| Disc face | Base part | Full part number by finish |
|---|---|---|
| Cross-drilled | 1M18049A | 1M18049AS |
| Slotted Type 3 | 1M38049A | 1M38049AS |
The last character sets the caliper finish or the line. 1 is black, 2 red, 3 silver, 4 gold, 5 yellow, 6 white, 7 fluorescent yellow. S is a GT-S caliper and R is a GT-R caliper.
Wheel clearance is the thing to check first. A 355mm disc with this caliper needs a specific wheel offset and spoke shape, and the requirement for a GT-R caliper is different from the GT version. Send us your wheel size, offset and make and we will read the clearance drawing against it before anything is ordered.
Downloads
- Caliper clearance drawing for 1M18049A, with the A, B and C dimensions (PDF)
- How to measure brake clearance against your wheels (PDF)
- Brembo GT fitting instructions (PDF)
Brake work is safety critical. Brembo asks that these systems are installed by a qualified technician, and the kit must be checked, bled and road tested to the instructions supplied with it before the car is driven.
