what the other guy said. if they come back up once pushed, they're fine.. maybe worn but not blown. they are fine to use with lowering springs.. the guy who bought my s13 drifts it once a week for the last 9-10 months.. theyve been on my ex-s13 for 1.5 years now with tein s techs.. no issues. check that they all come up at the same rate
-Bart