Is an Garrett T04B(A/Rs of .60 & .96)going to over kill a 400 to 500 hp b18c setup and plus what head gaskets are you guys using in this kind of power. I'm running a T04E .57 trim at the time and I want to feel more power. And one last thing any one that has a top mount turbo manifold with a carbon fiber hood? How is that working out?