These vans were built with soft springs so they ride nice: but once you add weight from towing or wheel chair ramps they sag.

The air shocks add up to 1,000 lbs of additional load capacity: allowing you to level out the vehicle when loaded. 

Here are 2 videos that one of our customers posted on you tube. https://youtu.be/mesbRfulfeY and https://youtu.be/f4YBuqpswTM. 

5 year warranty. PART # = P4485. CALL TO ORDER = 970-513-8283.