Ireland internationals Denis Hickie and Keith Gleeson return to the Leinster squad for their first home game of the Magners League on Saturday.
Michael Cheika's men, who lost in Edinburgh last week, face Cardiff Blues at Donnybrook on Saturday (kick-off 7.30pm).
Hickie and Gleeson are included for the first time this season, having been involved in Ireland's summer tour to New Zealand and Australia. There are also places for fit-again prop Reggie Corrigan and Development locks, Devin Toner and Richie Leyden (Old Belvedere), in the initial 25-man squad.
The team will be finalised at lunch-time on Friday.
Cardiff face the Ospreys tonight before travelling to Dublin for Friday's tie.
LEINSTER SQUAD: Forwards - Johnny Wickham, Reggie Corrigan, Will Green, Ronan McCormack, Bernard Jackman, Harry Vermaas, Adam Byrnes, Owen Finegan, Devin Toner, Keith Gleeson, Richie Leyden, Jamie Heaslip, Stephen Keogh, Niall Ronan.
Backs - Guy Easterby, Chris Whitaker, Felipe Contepomi (capt), Christian Warner, Gary Brown, Luke Fitzgerald, Denis Hickie, Rob Kearney, Ross McCarron, Michael Berne, Kieran Lewis.