The 09.B848.33 is a 390 mm Dual Cast front disc from Brembo’s Prime line, built for the big-brake Mercedes-AMG cars. Dual Cast is a bi-material construction: the high-carbon iron braking ring is cast directly around an aluminium hat, so the two metals are joined in the foundry rather than pinned or bolted together afterwards. Replacing the iron hat with aluminium takes a significant mass out of a rotor this size, mass that is both unsprung and rotating, while the friction surface stays iron and keeps behaving like iron when it is hot. Because the aluminium hat and the iron ring expand at different rates, the joint is designed to let the ring grow radially, which limits the coning that makes a heat-soaked one-piece disc feel long and soft at the pedal.
Note that Brembo builds a second Dual Cast disc, 09.C127.33, to exactly the same published dimensions, 390 mm diameter, 36 mm thick, 64.5 mm height, 67 mm centering bore, 5 holes, for the S-Class range. The two are different part numbers with different applications and are not interchangeable on dimensions alone; check the fitment list below rather than measuring the disc off the car. This is the front disc; the matching rear for the AMG GT and S-Class cars is 09.C128.33.
Specifications
| Product Line | Brembo Prime |
| Position | Front |
| Construction | Dual Cast — high-carbon iron ring with cast-in aluminium hat |
| Finish | Bi-material, corrosion treated |
| Outside Diameter | 390 mm |
| Thickness (New) | 36 mm |
| Minimum Thickness | 33 mm |
| Overall Height | 64.5 mm |
| Centering Bore | 67 mm |
| Bolt Holes | 5 |
| Disc Type | Ventilated |
| Type Approval | ECE R90 |
| EAN | 8020584315910 |
| Part Number | 09.B848.33 |
This part fits:
| Year | Make | Model |
|---|---|---|
| 2021-2023 | Mercedes-Benz | AMG GT 43 |
| 2019-2023 | Mercedes-Benz | AMG GT 53 |
| 2019-2021,2023-2024 | Mercedes-Benz | AMG GT 63 |
| 2019-2021,2023 | Mercedes-Benz | AMG GT 63 S |
| 2016-2021 | Mercedes-Benz | C63 AMG |
| 2015-2021,2023 | Mercedes-Benz | C63 AMG S |
| 2018-2021 | Mercedes-Benz | E63 AMG S |
| 2018-2021 | Mercedes-Benz | GLC63 AMG |
| 2018-2021 | Mercedes-Benz | GLC63 AMG S |
| 2013-2019 | Mercedes-Benz | SL63 AMG |
| 2013-2018 | Mercedes-Benz | SL65 AMG |
Shipping
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Returns
- 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
- Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
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- Product images may be representative. The SKU and specifications in the listing are what ships.
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