The saying you get what you pay for is true to an extent. Look for a header with a thick flange and ceramic coat or armour coat. also I prefer studs in comparison to bolts, I haven't had any leak problems on any of the headers I have installed on my cars. A nice gasket goes a long way as well. But remember a nice set of headers for a v-8 cost 600-900 dollars, you have half of that so expect to pay half, anymore your buying a name.
