Stainless Works Chevy Trailblazer SS 2006-09 Exhausts - Manual (Page 2)

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5. After rerouting of the EVAC tubes, you will have the necessary clearance for the
installed overaxle true dual pipes to fit through this area of the vehicle. Below is
a picture of the rerouted EVAC tubes.
6. The first step in installing the standard True Duals with exits out under both sides
of the rear bumper on your Trailblazer SS is the modification of the rear valence.
Please refer to the valence modification instructions that should be provided in the
kit. Perform this modification only if needed for your vehicle. Note this
modification is only required for the True Duals that exit out both sides of the rear
bumper. It is not needed for single outlet exhausts or center outlet dual exhaust
systems.
7. When installing the True Duals Center Outlet system, you will be required to trim
the rear bumper to match the picture below. This can be performed with a knife
and file. Also, if your vehicle came with a trailer hitch, that will need to be
modified as shown in the picture below. This will require removal of the plastic
bumper for proper modifications and cutting with a sawzall. You will also need
to remove the spare tire and spare tire holding device for the Center Outlet
system.