Largest hp gain in Evo 8 headers

[Boostdreamz]

Whats up guys right now im trying to buy a good gift for my cousin. He has an Evo 8 and wants headers, now i dont know to much about these cars. That is why im coming to you guys for help. He has an exhaust intake and a boost controller. I would like to know what headers could i buy for him to gain the maximum hp increase for his build. I need all the advice i can get because again i dont know much about these cars i just want to get him a good birthday gift thanks.

[SicLanEvo]

well since evos dont really have headers that would make it hard to find them. They reffer to this part as an exhaust manifold. does he have a turboback exhuast? Fuel pump? tune? it sounds like he would gain more power from other supporting mods before even needing a manifold. You could have the OEM manifold ported and coated that way it holds up and doesn't crack like other aftermarket ones.