American Car Craft Challenger SRT 8 Firewall Polished w_cap 6.1L 2008-2010 - Manual (Page 2)

Then attach the valve to the bracket using the ¼-20 nut and bolt
(provided). This procedure will force the vacuum valve to sit in a
further back position in order to allow the false firewall placement.
You will also need to reroute the water tank fill line. This line has
been routed by the factory across the engine bay to the tank and is
not very nice looking and can be pinched by the firewall if left in
position. To fix this simply remove the line from the tank, reroute the
line behind the aluminum block bracket that is mounted to the shock
tower pull it back up to the tank and reinstall. This will nicely tuck the
fill line out of the way and out of view.
3. Your new firewall panel comes to you flat. In order to achieve a nice
conforming fit along the wiper cowl gasket ridge it will be necessary
to slightly form the panel by hand. To do this you will need to remove
it shape it some and place it back into position several times until the
panel begins to sit relatively parallel to the wiper cowl ridge. It is also
important to make sure that the fuel line is centered in the notch
provided. We have experienced the transmission dip stick can be over
to one side or the other from car to car should this be the case with
your vehicle the tube can easily be adjusted by inserting a large long
screwdriver into the tube. This will give you ideal leverage to nudge
the tube so that you can achieve a nice centered appearance. Once
you are satisfied with the fit drill two 9/64 holes directly thru the
upper chrome trim and into the cowl ridge. Just to the left and right
side of the firewall you will notice two large plastic circular cowl
retainers on the cowl. These are good locations to place screws thru
the firewall to hold it securely.
4. Once the holes are drilled, remove the protective liner. Then secure
with the two chrome oval head screws (provided), just enough so
that the head of the screw countersinks itself into the chrome trim.
Be sure not to over tighten. Replace engine cover. HELPFUL TIP: There
are two ground bolts on the left and right side of the engine bay just
hidden behind the shock tower ridge. For best placement of your
new firewall you may want to rest the panel in front of these bolts!
5. For SRT 8 Models Only: Thoroughly clean the top of the factory