This is a nice looking High Tech braid that some of the guys have used. Melting Point is 445 Degrees. A little pricey...http://www.cableorganizer.c...L7oLsCFUdbfgodmHkAIw
The stuff the manufacturer's use is a Nylon Loom. The High Temp stuff usually has a stripe. Here's a good source ( at least for info)http://www.wiringproducts.c...bmWCASrrIaAj_P8P8HAQ
The stuff you can get locally ( Autozone, O'reilly's, Home Depot, etc) is usually the low temp stuff. I've used it ( I'm cheap), but you have to be really careful of your routing. If you can find a relatively newer car in the Pick and Pull, you might be able to score some clean loom that way too.