The Build and Parts List
| Vehicle | MINI JCW F67 Convertible |
|---|---|
| Front calipers | AP Racing CP9660, 6-piston fixed |
| Front rotors | STOPFLEX carbon ceramic, 355 x 32 mm, two-piece floating |
| Pads | STOPFLEX carbon ceramic pads |
| Wheel context | Sized for 18-inch wheel applications |
| Upgrade scope | Front axle brake upgrade |
Before you order
This is a front-axle kit sized for 18-inch wheels, but spoke shape and offset still decide whether the CP9660 caliper clears. A rotor-only swap only works if your car already runs fixed multi-piston calipers and a rotor of at least 330 mm. Otherwise, treat it as a complete front brake upgrade and confirm wheel clearance first.
What the Upgrade Actually Does
| STOPFLEX feature | Why it matters on the JCW F67 | What you notice |
|---|---|---|
| Carbon ceramic rotor, about half the weight of same-size steel | This is a short, nose-heavy car, so anything you pull off the front corners helps. Less unsprung mass lets the suspension control the wheel faster. | Crisper turn-in and a front end that settles quicker over broken pavement. |
| High-temp friction holds near 0.3μ at 900°C | The front axle does most of the braking on a JCW. On repeated downhill stops, an iron rotor heats up and the pedal goes long. | A pedal that stays firm and predictable when you're leaning on it stop after stop. |
| AP Racing CP9660 6-piston fixed caliper | A rigid fixed caliper doesn't flex like a softer OE-style unit, so it reports back exactly how hard you're pressing. | A more direct, communicative pedal you can modulate at the limit. |
| Cold bite over 0.4μ with STOPFLEX pads | Carbon ceramic has a reputation for being cold and wooden. STOPFLEX pads fix the first-stop feel for street use. | Normal bite on the first stop of the day, even around -20°C. |
| No-rust rotor face, very low dust with STOPFLEX pads | Iron rotors film over with rust after a wash and throw black dust all over the wheels. | Cleaner wheels between washes and no orange rotor face after it rains. |
What gets better
- Lighter front corners for sharper steering response
- Thermal headroom for repeated hard and downhill braking
- Firmer, more direct pedal from the fixed 6-piston caliper
- Cleaner wheels and no rust film after rain or washing
- Long street life, with ring-only replacement down the road
What to confirm first
- Caliper-to-spoke clearance for your exact 18-inch wheels
- Wheel offset and spoke shape, since both affect fit
- Current front hardware if you're considering rotor-only
- That you want a full front kit, not just pads and fluid
- Your real use case: street confidence, mountain roads, or both
If you're not sure your car matches the spec shown here, send us your wheel and caliper details and we'll confirm MINI JCW F67 fitment before you order through our MINI CCB collection.
Build Gallery
MINI JCW F67 Brake FAQ
Why run the CP9660 plus STOPFLEX kit instead of just better pads and fluid?
Pads and fluid sharpen the first part of the pedal, but they can't raise the heat ceiling of an iron rotor or change how the factory caliper flexes under load. This front kit pairs AP Racing CP9660 6-piston fixed calipers with 355x32mm STOPFLEX carbon ceramic rotors, so you get a firmer pedal and far more thermal headroom on repeated hard stops.
Will the 355mm front kit clear 18-inch wheels on the JCW F67?
The 355mm rotor and CP9660 caliper package is sized for 18-inch wheel applications, but you still need to check caliper-to-spoke clearance. Wheel offset and spoke shape vary, so send us your wheel details for a clearance check before you order.
Can I do a rotor-only carbon ceramic swap on a MINI JCW F67?
Only in limited cases. A rotor-only conversion makes sense when the car already runs fixed multi-piston calipers and a rotor of at least 330mm. Otherwise the complete front kit with the CP9660 calipers is the correct route.
How do STOPFLEX carbon ceramic brakes hold up in rain and daily driving?
STOPFLEX carbon ceramic rotors don't rust after rain or a wash, so the rotor face and wheels stay cleaner than a typical iron setup. Cold-weather bite stays normal even around -20°C on the first stop, and brake dust is very low when paired with STOPFLEX pads.
Do carbon ceramic brakes last longer than steel on a street car?
On a street-driven car that never sees track use, STOPFLEX carbon ceramic rotors can last roughly 250,000 to 300,000 km. The two-piece floating design also allows ring-only replacement later, which helps long-term ownership cost.
