my fireproof GreatStuff foam has been holding up great, honestly. I just checked it the other day when replacing my battery, and all looks fine. The stock radiator into the Unitronic intercooler was slapping around A LOT. I tried heavy duty metal zip ties on the bottom, but they kept breaking, so I ended up using bike cable wire (stranded steel) and twisting it up in the counter direction to the cable stranding. That's holding much tighter than the zip ties ever did.