I've just got this gauge and I want to install it, but my friends told me that the gauges are sensitive and that I need to know the inside and out of the materials.
PLEASE someone tell me the instructions step by step and I'll really appreciate it.

 

What gauge? *confuzed look*

 

It is an indiglo gauge please help!

 

Either way, I'd take it to a tuner shop and let them do it. It doesn't sound like you have too much experience with ripping cars apart.