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I use RS29s on the Z4MC with StopTech ST40 calipers and on the TT RS with the factory Brembo 4-piston calipers. They seem pretty quiet on the street - occasional squeaks but nothing to report unless you are super sensitive to any and all sounds.
TT RS: On track, I get about 8 days on a set of fronts with a mix of tracks like The Ridge (140+ mph on the front straight and 3 other 100+ mph straights), Thunderhill, Portland Int’l, ORP, Laguna Seca and Sonoma/Sears Point.
Z4MC: 8-10 days on east coast tracks like WGI, NJMP, Summit, VIR, Road Atlanta.
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