"They are one of the top sides, we played them four times last year and had three real battles and one where they got on top of us at home. We know we're in for a tough day at the office on Saturday."
The only change comes on the replacements bench with Rhodri Williams unavailable due to concussion. Last weekend's man of the match John Barclay has been named captain for Saturday's clash.
Saturday's Guinness PRO12 clash will be Scarlets' first outing at home this season and a win against champions Glasgow in the opening round last weekend has been a welcome boost for both supporters and players alike.
Pivac went on to say: "The boys love playing at home, every side does. We love getting out here in front of home supporters and familiar surroundings."
Scarlets team to take on Ulster, Saturday 12th September kick-off 3pm;
15 Steffan Evans, 14 Hadleigh Parkes, 13 Regan King, 12 Gareth Owen, 11 Michael Tagicakibau, 10 Daniel Jones, 9 Aled Davies, 1 Phil John, 2 Emyr Phillips, 3 Peter Edwards, 4 Tom Price, 5 Lewis Rawlins, 6 Aaron Shingler, 7 James Davies, 8 John Barclay ©
Replacements: Kirby Myhill, Rob Evans, Will Taylor, George Earle, Rory Pitman, Kieran Hardy, Aled Thomas, Tom Williams
Tickets for Scarlets v Ulster are on sale now priced from £14 for adults and from £4 for juniors. Tickets are on sale now from tickets.scarlets.co.uk or call 0871 871 8088.
Season tickets are also still available; for more information visit scarletsseasonwales.com or call 0871 871 8088.
Players unavailable for selection due to injuries; Harry Robinson (neck), Steffan Hughes (knee), Josh Lewis (knee), Wyn Jones (knee), Rhodri Jones (pec), Will Boyde (knee), Morgan Allen (bicep), Jack Payne (ankle), Rhodri Williams (concussion)
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