The build: hardware and fitment
| Item | Configuration |
|---|---|
| Vehicle | Denza D9 luxury electric MPV |
| Scope | Custom front and rear carbon ceramic big brake kit |
| Front setup | Brembo GTS 6-piston caliper with 405mm STOPFLEX carbon ceramic rotor |
| Rear setup | Brembo GTS 4-piston braking caliper with 380mm STOPFLEX carbon ceramic rotor, plus a separate caliper that retains the factory electronic parking brake |
| Pads | STOPFLEX low-dust ceramic compound |
| Weight saved | Roughly 30 kg total off the corners |
| Wheel requirement | 21-inch wheels needed for clearance |
Check this first: This is a custom BBK, not a bolt-in factory caliper swap. It's built around 21-inch wheels, but diameter alone won't tell you it fits — spoke shape and caliper clearance both need confirming, and the rear is set up as a dual-caliper layout so your factory electronic parking brake keeps working.
What the upgrade changes on a D9
| STOPFLEX feature | Why it matters on a D9 | What you notice |
|---|---|---|
| 405mm / 380mm carbon ceramic rotors | A fully loaded electric MPV dumps a lot of energy into the brakes on highway stops and long grades, where iron rotors heat-soak. | The pedal stays firmer and more predictable when you're braking hard, again and again, with a full cabin. |
| Fixed Brembo GTS calipers | A heavy vehicle needs caliper rigidity to keep pad-to-rotor contact even under high clamp loads. | Pedal feel is more consistent and less mushy than a flexing single-piston setup. |
| Half the weight of steel rotors | Cutting unsprung and rotational mass eases the load the suspension fights at each corner. | The big D9 feels a touch less heavy-footed over bumps and through direction changes. |
| Low-dust pads, no-rust rotors | On a premium vehicle, dirty wheels and rusty rotor faces cheapen the whole look. | Wheels stay cleaner between washes, and the rotors don't surface-rust after rain. |
| Retained factory EPB | The rear has to play nice with the D9's parking brake, brake-hold and stability systems. | You get stronger braking with none of your daily convenience features removed. |
What gets better
- More thermal headroom on long descents and repeated highway stops
- Firmer, more consistent pedal under a full load
- Around 30 kg less unsprung and rotational mass
- Cleaner wheels from low-dust ceramic pads
- Rotors that don't rust after rain or washing
- Factory electronic parking brake kept fully functional
What to confirm first
- You're running 21-inch wheels, and the spoke design clears the caliper
- Front and rear hardware matched as specified: 6-piston/405mm front, 4-piston/380mm rear
- Rear dual-caliper EPB strategy locked in before ordering
- This is a custom BBK, so fitment is verified to your exact car, not assumed
If you're not sure your car matches the spec shown here, send us your details and we'll confirm Denza D9 fitment before you order through our Denza CCB collection.
Build gallery
Denza D9 brake FAQ
Why run Brembo GTS calipers on a Denza D9?
The D9 is a big, heavy EV-MPV, so caliper rigidity matters. The fixed Brembo GTS design holds a more consistent pedal under repeated hard stops and supports the larger 405mm front and 380mm rear rotors used in this build.
Does this upgrade keep the factory electronic parking brake?
Yes. The rear is built around a dual-caliper layout: the Brembo GTS 4-piston handles braking while a separate caliper retains the factory electronic parking brake, so brake-hold and stability features still work normally.
Do I need 21-inch wheels for this Denza D9 kit?
Yes. This custom big brake kit is specified around 21-inch wheels for clearance. Diameter alone isn't enough, so spoke shape and caliper clearance still need to be checked before you order.
Will carbon ceramic brakes help range on the D9?
Only modestly, by trimming rotational and unsprung mass. The real reasons to do it are stronger heat-stable braking, cleaner wheels, no rotor rust, and a more refined driving feel on a heavy MPV.
How long do STOPFLEX carbon ceramic rotors last?
In normal street driving they last far longer than steel. STOPFLEX street-use lifespan can reach roughly 250,000 to 300,000 km when the vehicle isn't used on track.
