I'll check to see I'm not 100% sure what a 500 is?
Maybe your talking about a C-500 which goes to a marine transmission?
This is the standard V-Drive that connects to your prop shaft then to your driveshaft to the motor, not a transmission.
This is NOT a C-500.
Came out of my Biesmeyer Flatbottom .
Comes with Whirlaway or can be sold without it.