Compare the price of springs to air bags, either one will accomplish the same thing. Air bags will give you more adjustability. Neither will make you "legal", but will help support the weight.
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2015 3100RL legacy...2005 Ford F-250 CC SB. Tows like a charm! 4/19 Updated to 2017 Chevy 3500 CC SB SRW -hope it tows as well as my F 250 did!
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