Reddit reviews Design Engineering 010403 Heat Sheath 3/4" I.D. x 3ft Aluminized Sleeving for Ultimate Heat Protection

Hmmm...I really dont' want to use the flex joint because I can't weld and I don't think it'll be flexible enough for what I have in mind.

My application is as follows: I have a backup generator on my property and want to enclose it in a shed. I still need to vent the exhaust gasses though, so for that I have a separate pipe with its own support structure to do so.

However I need a way to connect the generator's exhaust with that extension exhaust...and due to massive vibrations I'm looking for a flexible connection.

I hope that made sense.

So in all honesty, I'm still looking for a fabric-like alternative...just something I can wrap around the connections of the two pipes...and flexible enough so that the vibrations don't damage the shed/pipe/generator itself. The seal doesn't have to be a 100%, just so taht most of the gas does get vented.

What are your thoughts about something like this or perhaps even this

It's cool that DEI has a kit specific for the 4.0L engines but to be honest you can do the same thing for a little less than their cost.

DEI 010403 0.75" Aluminized Sleeving Heat Sheath

DEI 010408 1.5" Cool Tape

Does your XJ already have the heat shield installed? If not you can get it here. CBXCB060 SHIELD-EXHAUST MANIFOLD

IMO hood vents are the last thing you should be doing to address heat issues. It's a band-aid instead of finding/fixing whatever the problem is that's causing the heat issues (whether it's heat soak, overheating, etc).