Huh. The nice thing about spiral wrap, unlike ty-raps which you need to cut and then replace everytime you want to add/remove/relocate a wire you can unwrap and rewrap it, and it keeps them bundled together tight and cleanly. I find it easier if you start from the middle on long pieces of spiral wrap, as you dont have long lengths of it flailing around while your trying to wrap it.
I mentioned the turbo wrap more to protect the electronics for the stereo and welding unit more then the wiring, I guess some on the downpipe would help too. Its possible lower temps may keep it cleaner, if dirt "bakes" onto hot surfaces to some degree. Not intending to tell you how to do your stuff, just thought Id mention it though.
