Driving at 70 MPH today with an outside temperature of ~95 deg F, I measured 140 deg F under the carpet of the transmission tunnel on the passenger side. On top of the carpet is 100+ deg, which makes it uncomfortable to sit in the passenger seat. This seems crazy to me--there should be a ton of air flow at 70 MPH. I measued exhaust back pressure in one of the O2 sensor holes and it was basically zero, so I don't think the cats are plugged. Any insights?