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 H21-07.
An endurance compound developed for GT and Porsche one-make racing, where a consistent pedal across a full stint is worth more than peak friction.
Operating range200–850°C
Cross-brand equivalents
Run something similar.
These are the compounds we stock for the AP Racing 6-pot RD54 (with tab) whose published friction and operating temperature come closest to Project Mu H21-07. They are a starting point for switching brands — not a guarantee of identical feel, because each manufacturer measures friction on their own equipment.
WinmaX W7
Partial match100–850°Cµ 0.48–0.53
The top of the W-series — professional circuit and rally use, and the highest friction WinmaX publish.
Matched on published operating temperature only — one of the two brands doesn’t publish a friction figure, so this is a weaker comparison.
From $508 · in stockCirco 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 $1009Circo 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 $508Compare every compound for the AP Racing 6-pot RD54 (with tab)
Fits the same caliper
More pads for the AP Racing 6-pot RD54 (with tab).
Pairs well with
