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 H16-03.
A carbon-ceramic race compound built for GT, TCR, WRC, historic racing and time attack. Its character is high initial bite with a clean release, which lets you brake hard without locking a wheel, and Project Mu specify it for both front and rear axles. The trade-off is pad life: it wears faster than H20 or H21, so it costs more per race weekend.
Operating range200–650°C
Friction µ0.45–0.60
Cross-brand equivalents
Run something similar.
These are the compounds we stock for the AP Racing 4-pot RD42 (CP3215 D40/D42) whose published friction and operating temperature come closest to Project Mu H16-03. They are a starting point for switching brands — not a guarantee of identical feel, because each manufacturer measures friction on their own equipment.
Circo M119
Very close50–800°Cµ 0.48–0.51
Circo’s sprint answer: around 0.5 friction from 50°C, so it works before the pads are hot. Rally and circuit.
Matched on published friction and operating temperature.
From $508Compare every compound for the AP Racing 4-pot RD42 (CP3215 D40/D42)
Fits the same caliper
More pads for the AP Racing 4-pot RD42 (CP3215 D40/D42).
Pairs well with
