The Blues go into the game on the back of Saturday's emphatic 4-0 win over Stoke City, and Snodin thinks that they can emerge victorious at Old Trafford.
Snodin wrote in his Liverpool Echo column: "Make no mistake about it, United will have their threats on the night and it's a game which is going to be 100 times harder and more demanding than the walkover against Stoke on Saturday.
"But there's a feeling that the Blues have nothing to fear at Old Trafford. I've seen enough this season to suggest we can go there and get on the front foot. Roberto Martinez won't instruct his side to sit back and play on the break.
"He'll tell them to go and cause United as many problems as they cause his side. You look at the United side and while they're still strong, it's not the team it once was. Players like Rio Ferdinand, Nemanja Vidic and Michael Carrick are all getting on and there's even a hint that United can be vulnerable these days."
The Blues are currently fifth in the Premier League.