I run 9660 on my m3, very satisfied on street and track, did consecutive hot laps and did not show any signs of brake fade, and constant strong initial bite. I like how I can modulate the braking power through these AP 9660.
But, once you take them apart, lube the snot out of the handbrake lever, and reseal the caliper, they work like magic.
Fitted newly renovated calipers, fresh discs and pads to one of my old 99s, and holy sh*t did it brake good. Also the handbrake on these things are phenomenal when correctly adjusted.
I have them on all 4 corners of my truck, 3yrs no issue. They bled like any other caliper.
i have installed these with no issue, it was just as easy to bleed as a regular single bleeder caliper.
I recently got a set of reman'd Girling calipers off RockAuto -- they fit perfectly.
Front drivers’ caliper is stuck open. I purchased an VW Ate refurb caliper but haven’t installed it. The other front side is good, and rears are only a few years old.
I actually replaced drivers rear caliper last year, retaining the original actuator and it was perfectly fine since then until suddenly the parking brake failure this year. Old caliper wasn't moving correctly so I ended up smelling and seeing the smoke driving home one day.
Wish they offered the same front caliper on Long Range besides the tiny uncoloured one I think it has, that's one gripe I dislike.
Be careful Powerstop calipers are just remanned calipers. Poorly powered coated. Paint came off the first winter and one caliper seized up in under a year.
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