I've been try now for a few hours to run the line throght the firewall but I just can't get it. How do you do it? Please give as much detail as possible. I tryed to run along side the main wirring under the drivers side a pillar but I don't think there is enough room. Please help as I am in a desperite hurry to get this install finnished befor it gets too cold.
Thanks Chris

 

You shouldn't really be running the line inside you're car for the obvious safety reasons. Instead you should run the line under the vehicle along side the fuel lines. I believe all nitrous manufactures recommend this method because if a line were to burst it would do so outside the car instead of inside. If you still want to run the line threw the firewall just keep in mind to use a rubber grommet if you drill a hole. Where exactly are you trying to pass the line threw the firewall? The easiest place that doesn't require any drilling would be located behind the hood release lever inside the vehicle. Just follow that cable, which leads to the engine compartment. You will have to remove your drivers’ front wheel and inner wheel well. After doing so, you will find an opening that accesses the engine compartment. Keep in mind that you must re-seal the hole where you run the line, which is the same location, the hood release cable uses, but the cable has a grommet, which is an exact fit. Either cut that grommet and stuff the N2O line or throw out the grommet and use silicone. Good luck!

 

Run out spare tire well. Check pix on my site

 

it shows the nitrous line running out of the spare tire well and under the car to the engine bay