Playing against his former country for the first time in Australia's recent 16-point loss in Auckland, Kepu was part of a scrum that provided one of the few areas in which the Wallabies could match their trans-Tasman rivals.
While the Kiwis were dominant in nearly every other aspect of the contest, Kepu claims his side can bridge the gap by turning up to Suncorp ready to be aggressive and relentless.
And without fear of raising the stakes in a match that will already decide the Tri Nations, the powerful loosehead prop admitted the winner would take the advantage heading into next month's World Cup.
"There's a lot on the line. Obviously a Tri Nations title, but also the psychological edge of going into the World Cup as the winners. I think it's a massive boost," said Kepu.
Since failing to compete with the All Blacks' physicality at Eden Park, the Wallabies have altered their preparations accordingly.
The elevation to the starting side of twin towers Dan Vickerman and Radike Samo - who yesterday caused half-back Will Genia to require six stitches in a training accident - shows coach Robbie Deans has zeroed in on the need to match firepower.
"We've added some size this week with Dan Vickerman coming in. [Vickerman and Samo] are really good aggressive players and that's something really that we're looking to build into," said Kepu.
"I think they'll add some more dimensions out the back there; a bit of x-factor and size - it'll be good.
"In terms of the training, the physicality is massive and something we have to bring to the game. The boys are really serious and really looking forward to the challenge."
For Kepu, whose parents still live in Auckland, there will be added motivation from facing the haka and in suiting up against players he grew up competing alongside in under-age representative New Zealand sides.
"A few weeks ago, for my family and for me, it was probably one of the biggest days of my life to come up against the All Blacks," said Kepu.
"It was really special and to get to do that again is something I'm looking forward to. It's special."
"I embrace (the haka). I love it. At college, we learned the haka and we did it every morning.
"I kind of know five different hakas, so it's always in the back pocket there and to actually face it is something that you don't (normally) get to do."
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