Well I can get you some from the engine side I had my dash in when I put them in. Clean shot all the way threw. I remember on the driver side it went threw the ac/heater vent area. I hole sawed threw the dash right into the valance then cut a square hole in the engine compartment then replated it back in once the tube was fitted. Funny thing was I was at a show and I asked a jeep speed guy about it he showed me where he went threw but told me it was dumb and not needed and if he were to do it again he wouldn't go threw the fire wall again I had the holes in that night =-)