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Right after I swapped my 04 RBB intake manifold and throttle body for an 07 setup, I pulled it back off and port matched the two halves, then honed everything I could reach with a flexi head Dremel. Haven't seen anyone else do this.

Work in progress:

Finished product:

I did this before my Hondata reflash and still felt a noticable difference in throttle response and mid-range torque, comparing to the same manifold with the original casting texture.
There is still lots of texture in the plenum and the beginning of the runners due to inaccessibility(without cutting manifold open). The injector base is done all the way through.
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