Maybe I am too much an optimist, but from what I can determine, you got a pretty respectable power gain just through headers and sports cat with stock ECU.
I had been wondering how well the stock ECU would handle a header change and you seem to have confirmed that it is up to the job.
What kind of power gain were you expecting from the remapped chip? Relatively speaking, it would have to be almost as much as the "header + cat" to justify the price and hassle?
Although the sports muffler didn't seem to to do anything for you power wise, did it at least give a decent sound? If so, perhaps the sports muffler should just be considered as an aesthetic upgrade?
Thanks for the sharing your travails...
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