I think your headed in the right direction. Forget the header, Honda makes great exhaust manifolds for what your doing with the car. But, they sound like crap, so get a good cat back system or else you'll be BUZZZZZZING around town with some cheap a$$ exhaust
. Forget the pullies, especially if your gonna run some big WATTS in the stereo and dorn't forget that dash melting TXs heat. If you want some cheap HP, convert your power steering to manual (loop the pump input and output, and the rack input and output then remove all access parts).
Oh, and never run 3" exhaust on a 6 cyl or a 4 cyl unless your boosted. The loss in exhaust gas velocities will kill the gains from your header. I can't remember the precise #'s, but it's something like - 2" pipe on a 4 cyl, 2.5" on a 6 cyl, and 3" on a 8 cyl. It really goes by displacement, but like I said and can't remember the exact numbers.
Quik