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The dyno operator was shifting way too early which is what made it sound so bad. The actual pull sounded like a race engine.
I think it's the stock muffler - it's tuned for the OEM midsection. My car sounds a little "off" with the fabspeed resonated xpipe and the stock muffler at low speeds and high load. The thing sounds absolutely amazing at 4k plus though.
I would guess you get similar, but not identical, sound with all the aftermarket xpipes.
Thanks for posting this for the forum!
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