Australia’s men are targeting a repeat of last year’s world championship win in London and enhanced their favouritism with some brilliant performances in the 100m final.

World champion Magnussen bettered the fastest ever 100m in a textile suit, clocking 47.10 seconds while James Roberts emerged as the second fastest man post supersuits a swim of 47.63.

Shanghai gold medallists Matt Targett and Eamon Sullivan also sealed selection with young guns Cameron McEvoy and Tommaso D’Orsogna snaring the other two spots.

Klim famously helped win Australia’s last Olympic gold medal in the event, alongside Ian Thorpe, Chris Fydler and Ashley Callus at the Sydney 2000 Games.

And he’s tipping Australia’s men will easily end a 12-year drought in the event by overpowering the Americans in London.

“Australia just assembled the best 4×100 ever no one will get close forget the guitars these boys will bring home the gold and create history,” Klim said on Twitter, referring to the Americans’ boast they would smash the Australians “like guitars” prior to the final in Sydney.

Magnussen said: “If the Olympics were going to be tomorrow you’d have to say that relay team was pretty bulletproof.

“The rest of the world can try and catch us. I guess that’s all they’ve got to do isn’t it?”

“Brace yourselves,” he said on pool deck before later fronting the media and declaring he had made another statement in the lead up to London.

“I’m sure they (my rivals) will have a few sleepless nights. I think it just keeps them second guessing their own preparations and keeps them chasing me.

“While ever I can just keep raising that bench mark it’s just going to be harder and harder for them to have any confidence going into the Olympics.”

Magnussen said he had decided to set out to break Cielo’s world record set in a supersuit at the farcical 2009 world titles in Rome.

Some predicted that record could stand for a decade after polyurethane swimsuits were banned following that meet but Magnussen now seems destined to break it in London.

“Yeah, I’m pretty confident I can get it, we’ve got another four months to drop .2 of a second,” he said. “I feel pretty confident after that swim but I’m certainly not going to rest on my laurels.

“I’m going to be doing everything in my power to break that world record because I do want to be considered the fastest man in history.”