I use the wrap I buy at AutoZone or O'Riley's , it comes in 2 different widths and I usually use the wider width. I do not use their metal zip ties but safety wire as I always have that laying around from the race bikes. I start my wrap up at the exhaust port end and wrap down to the collector using about a 1/4 inch overlap. The other thing I do is to soak the wrap in water first , it seems to me that I can get a tighter wrap that way.