Hrmm.... 10 hp? I dunno. I'll have to replace a lot more than the header. I'm not using the CX manifold, I'm using the DX and it's substantially larger than what it had before. But past the manifold, my exhaust is made out of parts from 3 different cars welded together. I spent $9 on it, and the whole swap gave me an extra 35hp or so at the wheels without really adding any displacement.

I need a new gearbox more than anything. CX gears are fun, but 2 2 2 tall.