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Originally Posted by Kirk
The pipe was designed to an exact length and diameter to reject certain frequencies. I think this is why you don't get resonances with the stock system.
Kirk
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Yes, I think so. Those chambers tune out drone in the 2-3k range. Though I like the sound, I think the 986 design really hurts flow. My guess is, what makes it quiet is the sound wave cancellation of the opposing cylinder banks which doesn't happen in the 996, 997, 987 and Cayman designs.
I do not think a max flow exhaust is necessarily a buzzy one. It depends on the length of the exhaust pipe and the Helmholtz principle.
Here's an interesting link,
http://www.autolounge.net/calculators/exhaust/exhaustresonance.html
RE: Pedro hack
I'm not crazy about the look, but I may just go that route. I would certainly be clean-er afterwards
