Here are some pics of areas I believe can be improved on the Challenger. The floor pan pic is taken from above the right front tire. The under dash is taken from the engine compartment and the one for the battery compartment is the floor pan immediately behind the driver and passenger and above the transmission. All of the areas are relatively accessible it just finding the correct material for the job since they are all fully or semi exposed to the elements.
On my coach the only carpet is the risers for the entry steps. Everything else is vinyl flooring so there is no putting sound deadening material between the floor pan and carpet so I have to go underneath the floor.
Batt compartment and stairwell
Floor pan
Under Dash
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