I just purchased a used IM for my H22.
I want to be able to build it while I drive my car.
Where can I send it to be port and polished, and get rid of the secondary runners?
I also plan to used a bored TB and plumb the IM for DP n2o.
Is there a great company out there that does IM work?
What else if anything can be done to it?
DPR?

 

For headwork I always recommend Portflow... Tom does AWESOME work!!! Since I really don't like the H22 I haven't took the time play with their IAB's... On a B18C1 IN manifold I just unbolt the halves, get shorter bolts and bolt it back together... I'm pretty sure that you could do the same with your manifold but I may be wrong... Extrude hone can extrude hone your manifold but they are kinda spendy, for that gains you're looking at... For nitrous plumbing you can do it all yourself if you are comfortable... I really don't know of any companies that specialize it that so i can't help much there either... Good Luck