Some details on my site. https://www.top4runners.com/ja/2007/airlift.html
For 2" longer springs go with AirLift Air Bag Kit #60733.
So one thing your site doesn't really covet is the factory spring isolator on the top (the one you cut down). Dobi need that for the RAS conversion? BC I can get a kit that doesn't have those but I am unsure about using the airbags without them.