I've had Bilstein Touring shocks on my 1991 240 and 1991 740 for about 18 months and both cars had very noticeable clunking noises when riding over normal streets. I took them off, looked for signs of damage, re-torqued them and still the same noise. So...I bought KYB Gas Adjusts for the 240, put them on and the noise disappeared completely. Then I did the same with the 740 and got the same result--noise gone. I measured both shocks with calipers and didn't see any real difference, just fractions of a mm. It's a mystery, but at least now I have an answer, don't buy Bilsteins again.