$200 plus shipping and any other parts you plan on installing of replacing when doign the install. gaskets, bolts, nuts, flex pipe if needed (modifying main cat to get flex pipe to fit)
Installing them is also very time consuming if you plan on installing them yourself. If you are going to have them installed, its going to cost you i think i had been reading about $300 ish.
so over all i would say that headers are not a cheap mod, but to some that maybe cheap
