 In recent years "air bag" systems (not to be confused with the air bag safety device) have been rapidly gaining popularity among car customizers.These air suspension systems use heavy-duty custom rubber "bags" to replace the stock shocks and springs, with either a compressor or tank of compressed gas used to raise and lower the vehicle at will.Any light-duty truck, from a small suv Chevrolet S10 Blazer to a full-size truck such as Dodge Ram 3500, can be outfitted to adjust the vehicle so that the frame will lie on the ground when the air bags are deflated, or "Laid Out".