78 320i rebuilding questions (archive)

currently I have the engine down to the block and head, with all the valves still on. I just have a few questions about the engine.
on the intake, after the filter, inside of that bellow, theres an aluminum disk thats in the path of airflow, but is able to move with air pressure, is this required? what would happen if i removed it when i reinstalled the rest of the intake? does it have anything to do with k-jet?

my other question is about a header. is it worth it? in performance compared to the manifold, whats really the difference?

thanks
-Rob

Follow Ups:

Re: 78 320i rebuilding questions Jim Baron 09:08 10/22/2000 (4)
- another point of question! mongoose 14:28 10/22/2000 (1)
  - Re: another point of question! Jim Baron 17:50 10/22/2000 (0)
- Re: 78 320i rebuilding questions mongoose 14:15 10/22/2000 (1)
  - Re: 78 320i rebuilding questions Jim Baron 17:49 10/22/2000 (0)
Re: 78 320i rebuilding questions John Gilson 02:04 10/22/2000 (0)

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