the travel with a lowering spring is only about 3 inches max, the Bavautos with a V8 will bottom out on anything larger than a cigarette butt. With the 6 you will get some more travel but still is limited by the shocks bottoming. I have the Eibachs now and they still bottom out on everything too. You should get the Bilstein sports with the internal bumpstop so you dont have to worry about cutting them things and them popping out and having a direct bottom and break stuff.
95 E34 530I V2.37
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