Faiumu is missing with a rib injury while Lunt has a groin problem that could force a lengthy spell on the sidelines.
Coach Nathan Brown is, however, boosted by the return of Australian international back-rower Luke O’Donnell after a seven game absence.
Brown said: “Luke O’Donnell could have played at a push last week, we just gave him another week off to be safe and he’s definitely going to be fit to come in. Shaun Lunt has been struggling for a while with groin trouble, so we’re not sure how long he’s going to be out for. Fuey (David Faiumu) has got rib trouble and he’s going to be out for a period as he’s been carrying it for a while.
“Some blokes unfortunately have been going on the injured list for a period of time now and the good thing is Luke’s back, so we’ve got some players sitting there waiting for an opportunity.”