As far as before and after dynos. The shop I had to use for the specific dyno was 3 hours away. So... repeated visits was not something I was excited about. And since I had to cut a hole in the air box and tie the piping. And the only way to install the airbox is from the back. Swapping it back and forth was not a quick and easy process and would take hours, and dyno time is by the hour. So, being able to do a before and after would be pricey and pretty much unnecessary except for comparison
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