There are a couple of things you can do. One is you can wrap the headers with the heat wrap. This works reasonably well, but it will shorten the life of your headers as the trapped moisture will cause them to corrode over time. The other option is to make your own using plug wires with ceramic boots. I ended up going with a header wrap, standard boot plugs, and putting the plug heat shield stuff around the plug boot, and haven't had a problem since.