Your stock one will pop out with a little effort. Installing the I/S baffle is a bit of a struggle. I did mine with the carb bank in place and only removed the tank & air box.
A couple of 1.5" plastic putty knives will assist in helping it by the carbs & rack bolts/nuts. A fair amount of patience and coaxing helps. I do not believe it's any easier by pulling the radiator & upper hose. I've done it several times and prefer going in from above. Don't even think of trimming it down to make it easier. If you do that you might as well leave the Std/Tour type in there. You need it to direct the flow out of the pods.
I slit the rubber drape around the guard mounts and rejoined with inner tube patches. I wanted full use as it was designed. My money is on Honda inserts that damn thing before installing the engine. I can't see them struggling like that in a production line.
You'll be amazed at the improved airflow control.
Have Fun!!!