Just use chicken wire Thats what i used on my tubular manifold. About £2 for a roll. Much tighter grip than those rubbish clips aswell.It'll cost you loads to wrap the whole system and for bugger all result in reality.
Cost me about 90 to wrap a 182 mani. Clips alone are about a fiver each or something daft
Flows quicker because its less dense.
£300, im wrapping my exhaust not my whole car