I just installed over the aluminum behind the muffler with Double aluminum insulation from Lowes 24inx25ft and under the floors.I tried the 3M glue it did not work,I bolted,I drilled thru the plastic floor panels and used hurricane shutter bolts with large heads with nylon locknuts and fender washers.So far So Good.PaulI am installing a knock-off set of Sparco seats with 5 point harnesses. I also am going to Dynamat the entire interior cause....DAMN this thing is noisy and HOT. Anyone else experience the heat in the cabin??. I know the guys in the Midwest and east have to be loving it, but the West Coasters are ROASTING, LOL!!