i've been searching through the post for somthing that covers this but did not find any,anyway my question is how safe is autometer fuel pressure isolator?i have the mechanical fuel pressure guage that can not be mounted inside the car unless you have the isolator.its not installed yet but a friend of mine is giving me his isolator next week and i'm a lil paranoid about installing it.so i was wondering if any of you guys have mounted one inside ur car using the isolator. thanks

That's what the isolator is for. It's used to put a mechanical FP gauge inside your car so it's safe.