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if you have the eibach drag springs i have ran as much as 30 psi in them...but when you have other weak suspension parts<stock>...you gotta be careful...start with the bag just starting to raise car then work from there...also those bags will pop in a heart beat so you have been warned
i think i just told ya....some racers despise them others believe in them....just start small then have somebody watch your rear and see how much it sqauts