Iput Febi Bilstein on mine and the passenger side went bad in one whole week! I spoke to my mechanic and he said to use dealer only as all the other stuff is either too soft or too hard. I still have not replaced them.

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual