ok this might be a stupid question but how do you secure the gauges when installing them into TA air vents? I dont know if this would be the correct forum section but figured what the heck. I know how most guages use a clamp you screw on but i dont see how that would work in the vents...maybe im wrong. Any tips?

 

shouldve looked under search first...guess just friction holds it in

 

they slide right in and secure themselfs 2 and 5/8 is what you need... mine are in great... dont move at all