difference between black and yellow bilstein shocks?

[daveyw]

i have black bilsteins on my touring and yellow ones on my donor car. is there a difference? (apart from the colour wise asses)

[fuzzy]

i think the black ones are standard shocks and the yellow are uprated,stiffer and shorter. might be wrong though so wait and see if i get shot down in flames

[Demlotcrew]

Black are oil, Yellow are Oil/Gas.

Depending on their part numbers they maybe shorter stiffer.

Andrew