I have a JDM b20b with intake, exhaust.
It puts down 135 WHP and 120tq with the above mods and I am considering buying either a good header or the skunk2 intake manifold. I will be using Crower 404's in the future but I cant make up my mind on what to buy this coming weekend.
what do you guys think would be the best mod at this time, header or intake manifold and why?

 

headers
cams
intake manifold

 

The Skunk2 intake manifold is a GREAT mod. I would do it before cams. But it is hard to say about before or after a header.

 

I'd do a header first. Something with a 2.5" collector.

 

great! Thanks for the info.

 

I say go with the Skunk2...here is why...

http://hybrid2.honda-perf.org/tech/b20/b20dyno.html

"Not quite the gains I expected to see. I changed the complete exhaust, and am not 100% sure I changed it for the better. Next time I will probably switch out the exhaust and cat to get a better picture. Also, the B20B cams are obviously not high rpm cams, so adding the header at this stage is premature. The header won't shine until I add the Crower cams, and raise the power peak rpms"
Go IM,cams,header
my 0.02