Fitment
Will this fit?
Fitment data still being indexed for this product. Ask BuildBot for a fit-check against your vehicle.
The compound
Circo M220.
A GT endurance compound built for 12-hour-plus racing, where holding a consistent pedal over a long stint matters more than peak bite.
Operating range200–900°C
Friction µ0.37–0.41
Pad lifeSame - no numeric figure published.
Rotor weargentle
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 Circo M220. They are a starting point for switching brands — not a guarantee of identical feel, because each manufacturer measures friction on their own equipment.
Project Mu H21
Partial match200–850°C
Circuit and endurance racing. Project Mu rate it as kind to the rotor with long pad life.
Matched on published operating temperature only — one of the two brands doesn’t publish a friction figure, so this is a weaker comparison.
From $656Project Mu H21-07
Partial match200–850°C
An endurance compound developed for GT and Porsche one-make racing.
Matched on published operating temperature only — one of the two brands doesn’t publish a friction figure, so this is a weaker comparison.
Fits the same caliper
More pads for the AP Racing 6-pot RD54 (with tab).
Pairs well with
