Header Suggestions..........?????

Dougs and TTI is the standard reply here , I went with hedman tight tube , dropped right in , 15 minute install, but hooking up exhaust for good flow took time . If you look at the charts I might lose 5 hp at peak , about the same torque wise . That was on a 300 hp crate , so not sure how much I lose with 412 hp but it does not feel any weaker than the hooker headers they replaced , maybe a touch stronger in top end .