Fitment
Will this fit?
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 Wilwood Superlite 7320 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 M127
Partial match150–850°Cµ 0.45–0.55
Sprint and time-attack. More outright bite than M119, but it wants heat in it first.
Matched on published operating temperature only — one of the two brands doesn’t publish a friction figure, so this is a weaker comparison.
From $508Circo M207
Partial match250–920°Cµ 0.45–0.56
The highest peak friction and highest peak temperature Circo publish — professional circuit racing, and it needs 250°C to come in.
Matched on published operating temperature only — one of the two brands doesn’t publish a friction figure, so this is a weaker comparison.
From $646WinmaX W6.5
Partial match50–800°Cµ 0.47–0.50
The standout for sprints and hillclimbs: close to 0.5 friction from a 50°C floor, so it bites on lap one. WinmaX call it their best rally pad.
Matched on published operating temperature only — one of the two brands doesn’t publish a friction figure, so this is a weaker comparison.
From $494Fits the same caliper
More pads for the Wilwood Superlite 7320.
Pairs well with
