The Bath player is set to come into the back row at open-side flanker after Curry damaged his ankle in England's 12-11 victory over South Africa last weekend.
Manu Tuilagi is poised to make his England comeback on Saturday after being included in a 25-man squad to step-up preparations for New Zealand's visit to Twickenham. It settles down the boys to know that he's there'.
"You need game-breakers don't you?" You know against New Zealand you're going to have to score tries, simply trying to slot penalties probably isn't going to be enough because of the threat they pose.More news: French police arrest six suspects in far-right plot against Emmanuel Macron
Four years ago he scattered the All Blacks with a rampaging display in a famous 38-21 victory at Twickenham and Youngs - his Tigers colleague - is eager for him to make his mark once again.
Some England players may doubt how well known they are to their Kiwi opponents, but Youngs is only too aware of the damage the world champions can cause.
"So having guys like him and other guys is vital because you need guys that are going to be game changers or game-breakers and he's certainly one of those guys, so he's going to be important if he's involved".More news: Driver Charged With Killing 2 Children In Park Slope Crosswalk Found Dead
"Our belief is very good", he added. "If he's 100 per cent, we will look at him for selection; if not we'll give him some more time".
"We don't want to get lost in what they do and how they play and everything like that". I'm really please he's able to get back out there. "I think everyone's been looking forward to the game".
'That is one thing we definitely don't want to do because we know what they're capable of.More news: Harvick takes Texas to clinch championship spot
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