Hey 109Spyder, where in Aus are you?? There's quite a few Spyder Ryders around the country with Yoshi pipes fitted, both with & without that baffle fitted (like Chupaca says, it's a standard part of the pipe :thumbup

so you should be able to track someone fairly local down to get a bit of noise exposure/comparison.
I tested one out on my (cat deleted) 2013 RT, & from that exposure I'm not all that sure that over time you wouldn't attract some unwanted attention by leaving the baffle out (altho it certainly let other road users know you were there!!) but even if you do attract that attention, maybe you could keep the baffle handy & just slip it back in..... problem solvered!

Well, maybe not if you are in QLD....

pps: