My KYBs failed quickly but I was really abusing my 944 in and out of NYC. I didnt expect them to fail but in comparison, Billsteins and Boge lasted through the same NYC torture test that I put the KYBs through.
I have to say though that the ride form the KYBs was great and I have yet to duplicate that 'just right feeling'. Bilsteins were too hard for me, Boges too soft, adjustable Konis not in the budget
'84 190E 2.3
'83 Porsche 944 (track car)
'84 Porsche 944 (parts car)
85.5 Porsche 944 (sled)