Originally Posted by Bx Tpr
had st40's installed on my old e90 M. beat the snot out of them 3x at watkins and 2x at limerock. Not much but I also drove the car daily and was able to go from summer to winter to track wheels without worrying about fitment issues around the calipers. also used the same pads all year and never an issue with the castrol srf fluid. amazing product for the price.
Thanks! I should receive them in a couple of weeks. Looking forward to using them on the track.