Here's what Energy Suspension says about their dust boots

I put mine on many years ago so I cant remember how I heated them or even if I did. I do remember using dielectric grease to get them to slide and it worked great. Also, the spring type hose clamps that mopar used are a perfect fit to hold the boot to keep it from popping off the crossmember. Without the clamp they would not stay seated. Not sure what they are talking about, these things are sealed air tight. Sure, the back end is still open anyways.
My bars are mopar performance, just under 1"

20200422_172857.jpg