ok ive been running without guages for too long....
what fitting do i need to connect a 1/8" line to the back of a viair or kp dual needle guage. or what kind of connecter is on the back as i have never seen the back of one....
both of those are the same fitting on the gauge side, the difference is on the air line side, wether you are running 1/8 or 1/4 line. If youve never ran air line to gauges before I'd recommend 1/8 inch.