The Foxes have won their last 8 home games in a row including FA Cup 1st and 2nd round victories over Stevenage and Dagenham respectively.
Leicester midfielder Andy King believes his side will still be the underdogs as they are a division below Palace.
King told BBC Radio Leicester: "It's a nice feeling - they're a league higher than us and are going to come here and want to play some good football.
"It will be nice to get a bit of league pressure off our backs and go out and enjoy the game."
King added: "We're looking forward to a nice open game. We played them pre-season and we played really well as a team."