There was some discussion about emulsion style shocks two months ago:
Originally Posted by
Rick Hohwart
I wanted to try emulsion style shocks (no bladder, air mixes with oil) and the easiest way to do this is to use older TC5 shocks that have the same thread as the off-road shocks. This way I could install the off-road shock caps with the bleeder screw.
Some drivers have tried to turn the standard TC6 shocks in emulsion style but the reliability has not been good. The TC5 shock is the easiest way to test the concept.