I am just looking for a description and how it works. thanks!

 

It's an exhaust specifically made for a 4 stroke engine. All of the new exhaust systems (except white bros) are just a straight thru 2 stroke design.

 

Sorry, I wasn't very specific. I know a reverse megaphone design is a four stroke exhaust, but internally what makes it different than a straight through design or a supertrapp disc-style exhaust. I've seen some pipes like CT or Sparks that are funnel shaped before the pipe enters the canister, is that a reverse megaphone?

 

yes that is the reverse megaphone i think it makes more power in that the gases expand rapidly and then go faster pulling out more exhaust i am not sure but i think that's how it goes