fatmat sucks in my opnion, and when I put it on I covered every square inch like a rookie and it's not designed for what I wanted. I'm battling horrible heat on the trail or in traffic without ac. one culperiate is the muffler half under the cab, and gets the floor to 165-170 withing 45 mins of idling. I was going to do lizzard skin bit have returned it and have some microbaloons for sou d and ceramic for heat. I've be looking into it more and bought some sound deadner showdown CLD tile and I still am searching for a hear barrier and a sou d barrier. now that u have a new harness to put in, I'm going to cover the firewall in something as well as the oem foam/rubber.basically I want the heep to be quiet and cool in the interior. and the fatmat is asphalt based, got hot and melted/oozed in areas. those type of products are meant for resonance control for the panel, not heat or sound from the tires like I had assumed.
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