I'm using that part number but a Lemforder part. I've had better experience with Lemforder from the BMW world. I didn't notice anything out of the ordinary when installing them, but I'm also not finished with my all my upgrades yet. I'm finishing up this weekend, I'll let you know what I experience.
I did notice some interference with the spindle and the ball joint retaining plate at full droop (stock strut) but that shouldn't affect anything at ride height.
Thanks. I'm going to order the Lemforder replacements as well. I actually have a feeling that interference you describe is what's going on with my car unfortunately. Not sure if there's a fix here or the arms are simply too long for my setup (notice the ball joint is pointed inward and not straight up/neutral). The ball joints are somewhere in the middle of the adjustment range. Maybe moving them inwards (narrowest track width) is the move as that way they'll be in a more vertical/upright position and will reduce that interference.
I have an S3 so alu subframe and CSS knuckles/lowered on PSS10.
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