The 20-year old winger will join the Premier League champions this summer after guiding the Eagles into the top flight this season and he departs Selhurst Park with the blessing of teammate Wilbraham who has supreme confidence in Zaha's ability.
"He's going to a great club," he told Sky Sports News.
"Wilf's done unbelievable for us this season and he's been outstanding in the play-offs as well but he's going to go to Manchester United and try to burst into their team, and he's more than capable of doing that.
"If the chance came for us to have him back on loan, we'd snap at the chance but we'll just have to wait and see what happens. I think Wilf's good enough to get in the team to be honest, he's a great player."