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I have run airbags for years ( Firestone and Airlift) (currently Airlift). For both, max was 100PSI and minimum was 5PSI. Anything in between is up to you. I run 55PSI when towing the fiver, maintains level setup. And all were correct, airbags do not increase GVWR or payload capacity, primary benefit is control of rear end drop when loaded.
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Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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