There is alot of heat from the cats the enters the cabin. the way I have found to combat this problem is to shoot the bottom of the car with a product called lizard skin. they have a heat shield spray as well as a sound deadner. I sprayed the tunnel area with these two products by taping off the transmission and removing the exhaust and spray this product on the tunnel area all the way back. it has reduced the amount of heat ten fold and it also acts as another barrier to prevent rust and such under the car as well as making it quieter. I have also seen the stick on heat shields as well but did not go this route for fear of moisture getting under it and making things worse.
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