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I want to install gauges and have decided on the Autometer
z-series. Which boost gauge do I need? They have one with boost / vac. and they sell one with boost only (30psi or 60psi). What is the vaccuum gauge for? Also they sell two trans temp gauges. One from 100-240 degrees and one from 140-280 degrees. Which one do I need? I just installed a 4" exhaust and tymar intake. I will be towing a 8000 lbs. travel trailer.