TT Surgeon

Tend to agree with bonehead, if you tend to track your car a lot, or push it hard enough on the track bilsteins are not that great. I found they had to have the ride ht set at such a level for max performance, (ie low), that I scraped everywhere. Then if you raise it up, the spring pressure essentially overpowers the helper springs and the ride sucks. So, basically they are not really adjustable out of about a 10mm ht field. plus their d links are a joke. I actually went back to GMG springs, much better ride and significantly better handling at the track.
Like I said the only aftermarket pasm option is the TPC version which is completely reworked, the next best setup for me is the GMG springs/sways/dog bones/etc on the stock dampners.

Farfelc2s

sent u a PM but your mailbox too full, very important to read.

Z06

My Bilstein DA shocks are non PASM, these are take offs from the Land RSR.
The real deal sort of speak!.