It does indeed Jaykay. All modern Porsche intakes do but I don't have a specific pic of the 2004. It is the same intake as a 2005 987. I believe the 987/997 have a more sophisticated 2-stage Helmholtz chamber incorporated into the airbox which is vacuum activated to maximize intake tube resonance at different rpm.
Here are the patent descriptions from Porsche AG:
Intake system for an internal-combustion engine - Dr. Ing. h.c.F. Porsche AG
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
Last edited by Topless; 04-17-2013 at 05:53 AM.
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