Fuel Pressure and boost wiring

[lwood]

What is the best way to run the electrical wire for the fuel pressure gauge and the vac line for the boost gauge (thru the firewall)? i have looked and there is really no open holes in the firewall of my 04 mustang. Please let me know what you guys have done.

 

[bobtsgt]

I have always ran mine on the drivers side threw the large grommet under the brake booster.

 

[MustangSteveGT]

I have always ran mine on the drivers side threw the large grommet under the brake booster.

same here. did the same with my gauges.

 

[DaBigBone]

I have always ran mine on the drivers side threw the large grommet under the brake booster.

+1. Done it on a couple cars.