Super Rugby's table-topping Reds have joined their cross-code Queensland counterparts, the Maroons, in feeling 10-foot tall and bullet proof at their Suncorp Stadium fortress.

Basking in the glow of a 17-16 win over Super Rugby favourites the Crusaders, hooker Saia Faingaa on Monday said the Reds believe they are invincible at league's "Cauldron".

Faingaa credited Sunday's record 48,301-strong crowd for lifting Queensland over the line in a titanic battle played with a Test-like intensity.

It was the Reds' 12th straight victory at the venue dating back to round two last year, also earned against the seven-time champions, and the Wallabies rake said confidence was sky high anytime they played at home.

"It feels like our fortress now and it feels like we can't lose there," he told AAP.

The sell-out crowd smashed the competition's record Australian attendance of 42,237, set in 2004 when the Reds beat arch-rivals NSW in the first Super match played at Suncorp Stadium.

Home success had been sparse in the years following, in contrast to Queensland's rugby league team.

The Maroons have dominated league's State of Origin for the past six seasons and have traditionally fed off the cauldron-like atmosphere at Lang Park.

The Reds also grew with it on Sunday as the Crusaders surged in the last 20 minutes and twice hammered Queensland's line with continual pick-and-drives but failed to cross the chalk, instead opting for penalty goals.

Faingaa said the deafening support helped Reds players pick themselves up time after time to repel the onslaught.

"They were camped on our try-line for numerous phases and we were under the pump but they only came away with the three points - that's unheard of for the Crusaders," he said.

"We were out on our feet.

"I hope we meet them again in the finals and I hope that it's at Suncorp. If we do it will be another spectacular game."

It would certainly ensure another financial windfall for the cash-strapped Queensland Rugby Union and the Reds could get two more big pay days if they finish on top of the ladder and win their home preliminary final.

Coach Ewen McKenzie said the huge crowd wasn't just a boost for his team but the code as well at a time when support in Sydney was drying up.

"The noise and the atmosphere was very football-like, soccer-like in terms of the UK - the competition between the fan bases with the chanting, it was a good occasion, it wasn't like a typical rugby crowd," he said.

Although just one-point separated them at the death, almost identical stats sheets also proved there was hardly a struck match between Queensland and the Cantabrians.

Only the Crusaders' set-piece superiority and the 11-5 penalty count to the Reds were a contrast.

"I've never seen a closer set of stats," said McKenzie. "There's basically one kick or one pass or one metre between the teams across most sectors."

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