Actually, they do make straight bolt-on air bag set-ups for Mcpherson struts. Pick up any compy of Lowrider Magazine, Lowrider Euro, or Mini-Truckin and look for the ad. The bags itself run about $500 per pair, plus air lines, gauges, tanks, and fittings. When I checked for a full kit, it ran $1700. I knew enough to just piece together the things I would need without buying the kit. Also, they are less trouble because if you spring a leak it's just air.