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Old 02-28-2012, 02:59 PM
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snrusnak snrusnak is offline
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Join Date: Jan 2011
Location: Orlando
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I am no expert on them, but I don't believe they replace any stock suspension part, and are just an addition. I believe their purpose is that when you have heavy load you can fill them with air and keep the sag out of the back of the truck. I'd think there should be an air fitting leading to them that you could fill/empty as needed. Some people mount electric air compressors on the truck to make it as easy as flipping a switch to change the psi in the air bags. I don't believe there's anything special needed to maintain them or anything, although I'm sure in some time they dry rot and begin to leak...
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