David 'The Wolfman' Williams.

The Wyong Roos are this week's VB NSW Cup version of Harry Houdini after their extraordinary last-gasp victory over Illawarra Cutters.

The Cutters led 20-12 thanks to Kiti Glymin's hat-trick of tries. The Roos stole their fourth win of the season scoring two converted tries in the final eight minutes. Abraham Papalii provided the heroics to score the match-winning try in the 79th minute.

Wyong have quietly risen under everyone's radar to sit second on the ladder and stamp their premiership credentials.

Sitting four points clear in first place are Mounties who still remain undefeated after holding off Newcastle Knights in a thrilling 24-22 contest.

In a riveting battle with the scores level at 22-all and just minutes remaining, Mitch Cornish stepped up under the pressure to slot the sideline conversion to keep Mounties' perfect record intact after six rounds.

Mounties take on Newtown Jets who are also in flying form with four wins in a row setting up a tantalising affair on Saturday afternoon at Henson Park.

The Jets powered their way into the top four of the VB NSW Cup after a dominant 40-18 display at North Sydney Oval. Newtown led 28-0 and never looked back.

The New Zealand Warriors bounced back into the winners' column in defeating the Wests Tigers 28-16 at home.

It's a disappointing result for the three-and-three Wests Tigers who lost their third straight match after their promising start to the season. Wests Tigers will be desperate to avoid a losing record against Illawarra on Saturday at Campbelltown in the Fox Sports match of the round this week.

The Manly Sea Eagles almost pulled off the upset of the round against the reigning VB NSW Cup premiers but fell 24-16 against the Penrith Panthers.

It was another case of Manly storming out of the blocks before stumbling in the final stages.

It was a gutsy effort for the Panthers despite the late withdrawals of Isaac John – filling in for the Panthers' first grade team – and Tupou Sopoaga.

The Wentworthville Magpies are the surprise packet of the round, upsetting the heavily-favoured Canterbury Bulldogs in a dramatic 25-18 affair at Pirtek Stadium. 

The Magpies survived a late scare by the resurgent Bulldogs to claim their second win of the season. Leading 18-6 at halftime, it took a Beau Henry field goal to seal the victory.

Round 6 VB NSW Cup highlights

Latest VB NSW Cup ladder