firewall question

[Owned69]

what would be the best way to get a vaccum line through my firewall? i cant seem to get it through for a boost gauge,
its in a 92 skyline gtst

[Cooked Rice]

You need to take a JDM drill bit to the firewall, and make a hole.







haha... follow the trunk release cable, engine harness, or throttle cable to the firewall, and stick it through the existing grommet. you may need to poke a small hole in the grommet for the hose.

i'd recommend a electronic boost gauge tho.