This may sound stupid but I have noticed on occasion that my exhaust sounds kinda girgley. Sometimes it's the normal deep roar but other times it sounds annoyingly girgley. It sounds worst at around 3000 RPM. Seems like it happens when the weather is warmer. Anyone know what I'm saying??

flappers?

Corsa tips are common for the deflector inside to start breaking free.

I have Corsa Captains call with internal flappers.

I have no idea what you're talking about... Whenever the flapper around here gets annoying, I stick a tool in the intake and then the gurgling starts, and everything is ALL RIGHT. Giggity.

But seriously, if memory serves, the solenoids for the Corsa system have two coils in them, one to "pull" and one to "hold". I wonder if a connection is corroded or the arms are out of adjustment allowing for a partial closure instead of full closure.

Here's the test procedure for the solenoids, somebody smarter than me will have to give you the directions on adjusting the diverter arms. They can go out of adjustment.

http://www.corsamarine.com/solenoid-testing.aspx

I was thinking of more of a kazoo or whoopie cushion when someone says their exhaust is making a "funny sound".