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Hmm for the 996 the mass airflow sensor section diameter is probably common for cost savings ; parts interchangeability etc. I did not know that these sections were shared. The reduction in diameter here would bump up the velocity with minimal losses.....so very little hurt for major parts sharing cost savings......just a guess.
When you get to the throttle body 68mm with a butterfly valve stuck in there is a de tune vs. a 74mm. as long intake velocity does not fall off below optimal....just a guess
I looked into rapid proto typing an intake piece I am making....low volume costs
are huge...The IPD price is a bit easier to swallow after that but....
I have all this rolling around in my head too. Let me know how you make out!
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986 00S
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