Not everything will......I have an SP model. Mine came with painted plastics, power steering and the alloy wheels. To get the winch, bumpers and rack extensions you need to get the SP Premium. I was told that the front box from an XP would fit but the box is different. The one I have fits the touring model. I think the XP is the touring model while the rest of us have different ones. I would think everything for anything but the touring would fit...if that makes sense.
Mine: 2018 Sportsman 850SP - 26" Bear Claw HTRs on OEM steel wheels(I really don't like the Aluminum ones)
Polaris Hand warmers, Mirrors.
Hers: 2019 Sportsman 450. 26" Bear Claw HTRs on Moose 427X Wheels.
2007 Sportsman 500 EFI, Polaris Winch, 25" Bear Claws QSC Clutch Kit, Hand Warmers
2001 Magnum 325 MOSE 12" rear wheel conversion. 25" Sedona Coyote tires
2017 Polaris Ranger 1000XP - Roof and front glass
2018 Kawasaki KLR650
2001 Magnum 325 Warn winch and Moose 60" plow-Sent to Daughter and Son-In-Law since his blew up
SOLD 2004 Sportsman 600 Twin