Quote:
Originally Posted by thstone
10-15hp increase for the flash alone.
I got another 6-8 hp from a $300 catback muffler (and have the dyno tests to back it up) but only above 5000 rpm.
Any hp increase from intake mods (like air box) are debatable unless you go to a larger throttle body.
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Is this on a 2.5? I haven't changed the air box, but i did install the larger throttle body from a 996. I'd consider doing headers and hi flow or no cats. I have an indy with the Porsche scan tool that can code ROW or any other tune the car will take. He is also a Softonic installer. Hmmmm.