Thermotec heatwrap it is the best. The color is up to you but it will tarnish as soon as it gets hot. I would recomend HIGHLY to use the thermo-tec high temp coating as a sealant to help prevent and prolong fraying. It will eventually fray from road debris though.
50' x 2" will be just right.
>link< <---- click on "uppipe/downpipe" then scroll down and click on thermotec products.