Agreed, I ran 20f/25r w/ a used set of HRE's that I sacrificed a bit on offset and my desire to run staggered because of the deal I snagged on them for my e39 m5 I drove a few years ago. The H&R Trak II w/ integrated studs and a hub-centric core that was not a separate piece (one solid piece of aluminum, rather than a removable ring type of hub that allows those cheaper manufactures to simply 'trade' out that ring and sell it as bore specific). When comparing my H&R's to a buddies Ichiba's (which he nearly paid the same price) there was a vast difference in quality. De Germans know their stuff.
Some valid points are brought up by the second poster in this thread, but I understood the changes, was prepared to remove them if the feel was too off for me..and I never raced/tracked my car. Just a DD that I wanted to flush out the 3-pc
rims a bit for a bit more aggressive of a look from the rear. I always hand torque my lugs and when dealing with spacers, would make should to torque those again 25-30 miles later after application in the Spring. Put wheels/tires back on, and do the same thing for them 25-30 miles later. I never encountered any looseness in the spacer lugs over the few years of application... I have read the stories and seen the resulting pics that scared me a first, but was quickly calmed after speaking to some BMW enthusiasts having run H&R spacers on various e30 and e36 track cars, as well as on their respective dailies.