Felix Jones comes into the back three on the right wing alongside Ronan O'Mahony on the opposite flank, with JJ Hanrahan staying at full-back.
In total Foley makes just three changes to the starting line-up that defeated Glasgow Warriors at Irish Independent Park last weekend.
In the tight five, Dave Kilcoyne comes into the starting front row at loosehead alongside Eusebio Guinazu and BJ Botha, while Donncha O'Callaghan and Billy Holland form the second row partnership for the fourth successive game.
The back row sees Dave O'Callaghan return at 6 with Sean Dougall and CJ Stander continuing at 7 and 8 respectively.
Foley's side sit on top of the table going into the away game to the Welsh side with kick-off at the Liberty Stadium at 2.40 tomorrow.
