I bought a set of used hks coilovers a while back an was wondering if they need any check ups, or are they something you can just leave alone an they will be fine. i never track them or drive too hard/ abuse them. thanks for help

 

check for leakage or scores around the shafts from time to time if you can't feel their condition from just driving around. the oil in the shocks can also degrade over time even without visible signs.

other than that, they are like any other coil suspension.