The tourists' four-pronged seam attack did most of the damage in the first Test at Lord's as the Proteas cantered to an innings and 12-run win to go 1-0 up in the three-match series.
England only batted 82.4 overs across both innings as Kagiso Rabada, Lungi Ngidi, Anrich Nortje and Marco Jansen ran through the home team's batting line-up.
With the first Test not lasting more than three days, Elgar expects his seamers to come out firing once again at Old Trafford.
The Proteas skipper told reporters on Wednesday: "I reckon they can get much better, they're still pretty fresh. The wicket assisted them at Lord's, we must take that into account, but you have to put the ball in the right areas and they did that.
"Our bowlers are leading our pack at the moment and they're extremely hungry for success. The competition among them is brilliant and the way they go about things is the most professional behaviour I've seen from fast bowlers."
Despite the one-sided nature of the victory at the Home of Cricket, Elgar knows Ben Stokes' side will be desperate to put things right from Thursday.
The opening batter though also said his team's hunger to wrap up a series win will drive them to the high standards they set at Lord's.
"We know it's going to be a lot tougher, England were hurt and I know they are coming back with vengeance against us," said Elgar.
"The scoreboard is on nought again now, we have to start again. What happened in the first Test was something pretty amazing for us.
"Our hunger was up there and our hunger is still there. That's not going anywhere and we're driving a hard message on that.
"It's difficult to read the future, I really wish I could, but I really hope the second Test goes the same way as the first."