In Round 1 against the St. George Illawarra Dragons, Hiku made his return for Penrith where he suffered a fractured eye socket from a late hit from St. George prop Russell Packer in the 42-10 shock loss at Jubilee Oval. Hiku was set to miss a month of footy but returned early in Round 3 against the Sydney Roosters where he came off the interchange bench in the 14-12 loss at Penrith Stadium. On 19 June 2017, Hiku was released from his contract mid-season from the Penrit club to join the Warrington Wolves in the Super League after he was going behind in the pecking order for the centre and wing positions. Hiku finished his 2017 NRL season with the Panthers with him playing in 9 matches and scoring 1 try. Hiku scored his first try in a 22-6 victory over local rivals the Widnes Vikings, and then scored again against them the following week in a 28-14 win in Round 1 of the Super 8 Qualifiers. Hiku would go on to play in 11 matches and score 10 tries in his short stint for Warrington. On 9 October 2017, Hiku was granted a released from Warrington on compassionate grounds to sign with the New Zealand Warriors on a three-year deal, starting from 2018. On 5 October 2017, Hiku was named in the 24-man New Zealand Kiwis squad for the 2017 Rugby League World Cup. Hiku only played in 1 match in the tournament which was against Scotland, where he scored a hattrick of tries in the 74-6 demolishing win at Lancaster Park in Christchurch.