It occurred to me today that the stock 06-08 R6 exhaust can (can be had on eBay pretty cheap) had the EXUP valve in it, so someone who wanted to open up their exhaust could use a V&H or comparable header and can with a custom mid-pipe housing the stock R6 EXUP valve. You'd have a better flowing exhaust while retaining your low end power gains (and probably smog-compatibility) of the EXUP valve.

Just a random thought I had while thinking of my bike at work (as opposed to actually working), and I didn't know if anyone had thought of it before.
So there's the idea.
