Decided to modify the stock mufflers on my '13 Iron 883. Not as a performance gain, but to add just a bit of tone to the overly quiet stock exhaust. The stock mufflers pass straight through with the exception of what looks like soft plugs blocking the path about 9" from the output.
The modification increased the db by approx 4db, which is quite noticeable, mainly in beep base tone. The performance doesn't seem to different, but may have been boosted in the 2,500~3,000 rpm range. 5th gear at 50 mph was too low before, but pulls it fine now... I'll need to get more time on it to make a final analysis.
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