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wow, those towers look really beaten up for how much they cost.
Based on corrosion, that's probably 1 year of use in the northeast. The coating TF uses is extremely cheap and doesn't last. But, you get what you pay for with TF.
You can tell by the spring color that it's lifted, likely 2" or so. I have a thread on here with measurements. Think it's called Share your Measurements
If that's the front, there never were air shocks there. They just replaced the stock shock mount towers with the TerraFirma units, probably because the originals were rusted out.