Ok MY brother car know has a 91 turbo and manifold on it. We baught a boost pressure guage and would like to install it but the directions do not tell where to conect it. I was hoping somebody could help?

There should be a nipple covered with a plastic condom some where on the intake manifold. Not on the top but on the side sort of. Use one of those for your gauge.

ok on the passenger side of the car there is the metal vacume lines one is capped by a plastic condom like thing. the autometer guage hooks up with a screw on fitting just like an oil pressure guage. How would I conect it to the line?