Hi everyone, where do I route the piping for a boost gauge? I want to fit it where my drivers side vent is, I have the gauge and vent holder for it but can't figure out how to get it through the dash and through the firewall, any help would be appreciated tia

There will be a number of grommets hiding behind the engine on the bulkhead where various wires and tubes enter the passenger compartment, use one of these for your boost gauge pipework.

Take out the glovebox and there's a grommet behind it. Comes out by the abs pump in the engine bay.