I use high temperature fiberglass boot socks. I just snipped and removed the internal rings with a pair of side cutters, and rolled the edge up inside the boot a bit. Worked great on my plugs. No more issues with burning plug wires.
I like those boot socks too. I have them on Richard's plug wires in addition to the metal shields, to cover the wires. I'm a "belt and suspenders" kind of guy though.
We're also using them on a LS swap I'm working on in an old Datsun 280Z. I just used needle nose pliers jammed in the ring and spread them enough that the end of the ring could poke a small hole in the sock, then rotate it around to pull the ring.
There are a couple of vendors on Amazon that sell those socks with both ends stitched, no rings, but they cost so much more I'm not sure it's worth it. I think one of those sets was longer socks, and triple layer instead of double layer and stitched at both ends instead of those metal rings, so that might be better, but I don't know if it's 3 time the price better.
What also worked great and I highly recommend is thermal barrier coating your headers inside and out. Made a massive difference to my engine bay. Definitely worth every penny.
I've always sent new headers (after any required mods like removing AIR pipe fittings and such) to Jet-Hot Coatings. Expensive, but worth it.
Right now my budget is a little low, and I was wondering if anyone has ever tried a DIY approach. I see that Eastwood has a coating spray that is good for the internal surfaces of exhaust. https://www.eastwood.com/eastwood-hi...ust%20Coating#
It's an aerosol, and it comes with a sprayer attachment that looks like the nozzle you'd use to put rustproofing inside frame rails and doors and such. Right now, I'm tempted to try that for Richard's headers that I still haven't installed yet.
Has anyone else used that Eastwood product? I might have to TOFTT here.