[5] Halafihi first played provincial rugby for Taranaki during their ITM Cup Premiership title winning season of 2014, starting once and coming on as a replacement twice.

He was much more of a regular in 2015, scoring 3 times in 9 outings to help the Bulls reach the Premiership semi-finals where they surrendered their crown to eventual winners, Canterbury, going down 46-20.

[3][6] Good performances at domestic level for Taranaki over the course of the preceding 2 seasons brought him to the attention of Wellington-based Super Rugby franchise, the Hurricanes who named him in their squad ahead of their title defense in 2017.

[2] On 8 December 2021, he was selected by Alessandro Troncon to be part of an Emerging Italy 27-man squad for the 2021 end-of-year rugby union internationals.

In February 2023, Benetton head coach Marco Bortolami, anncounced that Halafihi could also become an option for Italy in the 2023 Six Nations Championship.