Hey, nice bike. The '96 is definitely something special. The only one with the sought after purple tank

Back then there were some FMF pipes without any description to them except for the embossed FMF logo.
The only thing that comes to my mind when I hear FMF grizzly are the FMF "Gnarly" pipes.
Those are meant to give you a little more bottom end grunt. Maybe that is what the seller meant and got the words mixed up.
And yes, quads probably came up with your search because FMF offers pipes for the Yamaha Grizzly quad.
Have fun with your new old bike
