I have been seeing more and more people ordering the Ironman Foam Cell Pro lift but haven't seen a consolidated thread on the product. They are popular in Australia but don't have a strong foothold here in the US. Looks like they are gaining a little bit of traction with the 5th Gen 4Runner crowd. If you have the lift this is the thread to post in.

"A shock typically fades as the internal temperature increases, oil and Nitro-gas emulsify; under consistent use, this can lead to complete failure. Foam Cell technology removes the Nitro-Gas from the equation, filling the shock absorber with oil. More oil equates to increased cooling/dissipation of heat; our foam cell sleeve controls the dampening of the piston. The results are the optimal performance, specifically with heavier vehicles carrying accessories such as front/rear bumpers, winches, rooftop tents, work equipment, or when towing.

Foam cell technology also decreases the strain on the shock by removing the Nitro-gas, this removes internal pressure on the seals and increases the service life of the strut, allowing the Foam Cell Pro's to work at peak performance for much longer than any other suspension out there. When it is time for a service, the Foam Cell Pro shock absorbers are completely rebuildable."