All Black Francis Saili and Tyler Bleyendaal make their starting debuts in the centre and out half for Munster in Sundays clash with Ospreys in Liberty stadium.
Hooker Mike Sherry starts as his return from a near two year injury lay-off continues.
The Reds opened their campaign with a win over Treviso in Cork last weekend.
Ulster coach Neil Doak has made two personnel changes and one positional switch to the team that recorded a bonus point win over Ospreys last weekend for tomorrows game against Scarlets.
Andrew Trimble was unavailable for selection having suffered a hip flexor strain, therefore Craig Gilroy switches flanks and starts on the right wing, with Rory Scholes coming in on the left.
The other change comes in the pack, with Peter Browne starting his first competitive game for Ulster in the second row in place of Dan Tuohy.
Leinster captain Kevin McLaughlin has failed to come through the return to play protocols so misses out on their meeting with Cardiff at the RDS tomorrow.
Garry Ringrose will make his debut for Leinster on the wing.
Connacht face champions Glasgow Warriors tonight in Scotstoun Stadium
Pat Lams side have lost to the Warriors in their last 7 meetings.
Kick off is at 7.35
