I have a red underbody kit, minus the rear tube.  it is still laying around.  does anyone know how to drill through the rear metal bumper to put the screws into hold it up.  I've torn up many self-tapping screws and a bit.

I'm no expert on nitrous, so I may be off base with this.  The test port is at the end of the front rail where fuel would be pushed out to.  Being this is a wet system, the closest injector would get fed almost pure nitrous and the furthest away getting fed very little, if any.  Also, since it has a double rail, the front rail would be supplied, but the back rail would maybe get some, but not a whole lot, which would cause some cylinders to fire a lot harder than others.  Like I said before, I'm no nitrous pro, but I just don't want to see you blow apart your engine.