ok well this is going to be my new project i want to replace the exhaust on my atv with something new, what i want is for it to have lots of nice colors (once the exhaust heats it up )

so im kinda new at the stainless (knowing of which to use) but i can make nice sanitary welds so need some help please.

what thickness ?
type of material?
tig rod (currently have 308L)

and any other use full tips and advice thanks

and if any one has pictures of exhaust they have done i would love to see