I just replaced my original Boge's with Bilstein HD's all the way around because right front shock insert was broken. The HD's are a little stiffer than Boges, but honestly, I can't tell too much difference in the driving of the car. Either the originals were still in pretty good shape (despite the break), or I'm an insensitive clod
I do like knowing the shocks are good quality and new, however, so it's worth it for that alone. The car must be sitting a bit higher too, because I don't scrape getting out of my driveway anymore. So, I'm pleased with the Bilsteins, and the install wasn't very difficult.
Don Ivey
'87 Carrera
Raleigh, NC