Pads for Alcon B-type / AP D49 / Brembo B13.
Fits: Alcon B-type, Alcon CRB343, AP D49 window 4-pot, Brembo B13 4-pot.
What we’d fit.
Both are competition compounds. W6.5 is the better choice where sessions are short; H16-03 publishes more friction once there's heat in it.
WinmaX W6.5
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.
View this padProject Mu H16-03
Project Mu’s GT and TCR-level race compound.
View this padMove to Project Mu H16-03 when you want the higher published friction of a dedicated race compound.
This is TrackTheory’s recommendation for the Alcon B-type / AP D49 / Brembo B13, not manufacturer advice — a starting point based on the published figures below and what we stock, not a survey of what other competitors run. Car weight, driving style and how long your sessions are all move the answer, so tell us yours and we’ll give you a straighter one.
Same shape. Very different pads.
Every compound below bolts into the same Alcon B-type / AP D49 / Brembo B13 caliper. What separates them is operating temperature and friction — a sprint pad that needs heat in it will feel wooden on a cold first lap, and a road-biased pad will fade before the end of a long race. Figures are the manufacturers’ own published data.
Project Mu PCR09
4 options · from $387 · 1 in stockProject Mu’s Club Racer. A strong trackday pad, but with a 300°C floor it is the range’s worst choice for a cold first lap.
300–800°Cµ 0.42–0.55Needs heattrackday · circuitWinmaX W6.5
1 option · from $494 · 1 in stockThe 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.
50–800°Cµ 0.47–0.50Usable from coldrally · sprint · hillclimb · circuitProject Mu H16-03
3 options · from $470 · 1 in stockProject Mu’s GT and TCR-level race compound.
200–650°Cµ 0.45–0.60Needs some heattrackday · circuitProject Mu H20
3 options · from $525A sprint and flying-lap compound used in GT and NASCAR classes.
200–800°Cµ 0.42–0.44Needs some heatsprint · circuitWinmaX W5
3 options · from $405WinmaX’s standard circuit model, and the default club racing and rally choice in the range.
100–750°Cµ 0.40–0.43Usable from coldcircuit · trackday · sprint · rallyWinmaX W4
1 option · from $376Sprint and entry-level motorsport, with a low enough floor to still behave on a cold first lap.
50–700°Cµ 0.37–0.40Usable from coldsprint · trackday · circuitWinmaX W3
1 option · from $362WinmaX call this their most versatile pad: sportive street through to sprint racing. It is the W-series compound we stock most of.
0–650°Cµ 0.34–0.37Strong from coldstreet · trackday · sprint · hillclimbProject Mu H21
3 options · from $572Circuit and endurance racing. Project Mu rate it as kind to the rotor with long pad life.
200–850°CNeeds some heatcircuit · enduranceProject Mu H22
2 options · from $525The rear-axle partner to H20, H21 and H16-03, chosen for low wear.
circuit
Figures are the manufacturers’ own published data for each compound. Where a brand doesn’t publish a figure we say so rather than estimate it. From cold is our reading of each manufacturer’s published minimum operating temperature, not a separate rating they publish. Manufacturers test on their own equipment, so friction numbers are best compared within a brand rather than across brands. Not sure which suits your Alcon B-type / AP D49 / Brembo B13 setup? Ask BuildBot or email us with your car, class and typical session length.
Where this caliper turns up.
Project Mu compounds (15).
WinmaX compounds (6).
One shape, every part number.
These part numbers all share the Alcon B-type / AP D49 / Brembo B13 backing plate. The suffix is the compound (and plate thickness where the shape comes in more than one) — ask us or BuildBot which compound suits your discipline.
| WinmaX | WMP813-16-{W3|W5|W6.5} · WMP813-17-W4 · WMP813-{18|25}-W5 |
| Project Mu | F1384-* (Alcon 4-pot NDB8547) · F1385-* (Alcon 4-pot NDB8526) · F1382-14.5-* (Alcon 4-pot) |
| Cross-references | Winmax global PBP813 (Alcon B-type/CRB343/CAR49) |