holes????

[4u2nv]

hi every one i am fitting an after market boost gauge and cant seem to find any holes to put the pipe through the firewall. do you know of any holes or do i need to get the drill out.

[Yelfig]

There is a hole...follow the vac line from the OEM dump valve and you'll see it...
Else you can just take vaccum with a 'tee' from the oem boost gauge (check at the back of the clocks)

[GT3guy]

The primary vac./boost pipe for the OEM boost gauge goes through a separate hole in the grommet with the engine bay to cabin+dash loom, fusebox, etc. Just use that, or replace with silicone, then T-off, if necessary. Feeding another vac./boost pipe wouldn't be easy, as that grommet is behind the brake servo etc.

[Superman]

The access gromit for anything extra going through the firewall is in the passenger footwell, just under the dash near where the carpet ends, its an obround shape about the size of a hobnob.

[4u2nv]

thanks guys that is a great help as i didnt want to put extra holes in

[MFrV1]

The access gromit for anything extra going through the firewall is in the passenger footwell, just under the dash near where the carpet ends, its an obround shape about the size of a hobnob.

Possibly the first time a Hobnob has been used as a unit of measurement.