Andrew Trimble returns to the Ulster team ahead of the European Cup meeting with the Llanelli Scarlets at Ravenhill tomorrow night, while Scotland's Simon Danielli is also selected.
Timoci Nagusa's hamstring injury means Danielli comes on to the wing after scoring two tries when called upon to replace the Fijian against Connacht in the Magners League last week.
Trimble starts on the left wing instead of Mark McCrea who is named on the bench, while the pack remains unchanged from the 53-13 win over Connacht.
Ulster are targeting four wins from the remaining four games after a slow start to the competition left without a point, trailing Stade Francais and Harlequins by nine.
Coach Matt Williams expects the top two to slip though, and is adamant his side are in a position to capitalise when they do.
"We are still in the Heineken Cup, we have to win all four (remaining games). We are playing every team in the pool and if any one of them slips up, which is a strong chance with Stade at Quins, and we win our next two games, we are in it," said the Australian.
"But that will mean nothing if we don't win at home. But even if we were out of it, which we are not, the attitude wouldn't change. We would still go flat out at Ravenhill.
"We have worked too bloody hard and been through too much pain and come together so far to come out at Ravenhill and just say 'it doesn't matter'. That's just not going to happen."
Ulster: B Cunningham; S Danielli, D Cave, P Wallace, A Trimble; I Humphreys, C Willis; J Fitzpatrick, R Best (C), B Botha, E O'Donoghue, R Caldwell, S Ferris, D Pollock, R Diack. Replacements: N Brady, T Court, M McCullough, K Dawson, I Boss, P Steinmetz, M McCrea