Fitment
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Fitment data still being indexed for this product. Ask BuildBot for a fit-check against your vehicle.
The compound
Project Mu H21.
Project Mu’s endurance answer, and the compound with the strongest reputation in oval racing — particularly short circuits. It gives up some outright friction to H20 in exchange for excellent fade resistance, strong modulation, long pad life and unusually low rotor wear. Used in GT, V8 Supercars, NASCAR and Trans Am, front or rear.
Operating range200–850°C
Pad lifelong
Rotor weargentle
Cross-brand equivalents
Run something similar.
These are the compounds we stock for the Brembo GT 6-pot B24 (RD54) whose published friction and operating temperature come closest to Project Mu H21. They are a starting point for switching brands — not a guarantee of identical feel, because each manufacturer measures friction on their own equipment.
Circo M207E
Partial match150–900°Cµ 0.42–0.49
The endurance version of M207, aimed at 12-hour-plus races.
Matched on published operating temperature only — one of the two brands doesn’t publish a friction figure, so this is a weaker comparison.
From $1124Circo M220
Partial match200–900°Cµ 0.37–0.41
A GT endurance compound for 12-hour-plus racing.
Matched on published operating temperature only — one of the two brands doesn’t publish a friction figure, so this is a weaker comparison.
From $1254Circo M210
Partial match200–800°Cµ 0.47–0.54
Circuit and tarmac rally, with a broad high-temperature window.
Matched on published operating temperature only — one of the two brands doesn’t publish a friction figure, so this is a weaker comparison.
From $1426Fits the same caliper
More pads for the Brembo GT 6-pot B24 (RD54).
Pairs well with
