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Do a search for Wong or Steve Wong. There is more info here than you could read in a week.
FWIW, I have a SW chip, which is set up for a Fabspeed premuffler, drilled airbox, and a Flowmaster muffler. I'm very happy with the setup, but I have no hard performance numbers for you.
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'08 RX350 (Hers)
'84 911 Carrera
'83 911SC Cabrio
'06 Miata
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