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I got a chance to work on this yesterday. I popped out my engine under tray and then took the screws out of my center section. I did not see any evidence of heat around the cats or the rest of the exhaust causing issues, but trying to be safe and not sorry I went ahead and cut out the areas under the cats and other low hanging exhaust parts. This is the piece with the rectangular holes and the small circles. Next I took the previously offensive back piece and trimmed it to stop before the muffler. I then drilled holes through it with a hole saw right under the exhaust. Then I cut the areas between groups of holes out with my saw. I also tried to bend up small lips in all the aluminum holes, to keep from having sharp edges to grab road debris. I then reinstalled these pieces.
Well I drove my one hour commute to work this morning and got out and felt my gas tank. The gas tank was not hot, but it was slightly warm. I felt other areas of my cars undertray above the belly pan that I could reach, and they were slightly warm as well. The aluminum tray was slightly warm as well.
I believe that because there is warm air blowing around above the belly pan, anything that is above the pan is going to be warm. I will be checking my tank temps a few times on my drive home from work this afternoon, as I have everything I need to remove the rear pan section with me in the car.
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