Sixth-place Huddersfield host the Vikings (3.00) looking to make it four top-flight triumphs on the trot.
After disposing of Bradford Bulls, the Giants turned up the heat with emphatic victories over Catalan Dragons and Wakefield Trinity Wildcats.
And Crabtree is confident this could be a sign of things to come.
“We’re obviously aiming to go unbeaten into the play-offs,” said Crabtree, whose side follow up tomorrow’s John Smith’s Stadium clash against Widnes with two more homes games against Hull and St Helens and a trip to Warrington before the play-offs get under way.
“But the main thing is that we go into those play-offs in good form – the sort of form we’ve been starting to show in our last two games against Wakefield and Catalans.
“Those two games were really pleasing and have probably been our best performances of the season, especially the first half against Wakefield.
“That suggests we’re starting to find our best form when it matters the most, so we’ve got to make sure we make the most of this.
“The aim this weekend is to produce an even better performance than we did against Wakefield, and we know that’s important if we want to secure another win.
“We’re expecting a backlash from Widnes following their Challenge Cup semi-final defeat to Castleford and we’ve got to make sure we’re ready for that.
“We know we’re going to have a physical battle on our hands, and we need to prevent them from building a platform and stop the quick play-the-balls, because that’s when (chief Widnes playmaker and former Giants captain) Kevin Brown is at his best and can make the opposition pay.”