The exhaust on my truck exits just in front of the rear wheels. The mufflers are almost directly below the seat. I get a lot of heat inside, most noticeably as it comes through the gap between the back and bottom of the seat. I've looked at various insulation solutions but can't decide what might work best. I have a wood floor so an adhesive-backed sheet on the bottom side won't work. Should I insulate inside? Wrap the mufflers? Other solutions? Please give me any suggestions you have on how to solve the heat problem.