FX 850 and been daily using the car last month. From 15-27 psi all day long.
No issues, and a very nice pedal feel. Around 40% stiffer than stock.
A little scwizze sound when the clutch engaces, but no problems.
If this clutch holds up, its a great setup.
Thanx CTS for a superfast shipping of 2 sets of FX850 over to Norway.