"It is going to be very, very tough, they have an experienced squad and we'll have to be clinical with the chances we create and come away with the right result."
Ulster currently sit in 6th place in the league table on 25 points with Scarlets in 9th place on 17 points.
Ulster Squad
The backline is bolstered with the return of Andrew Trimble and Paddy Wallace, both back from Ireland camp and Nevin Spence is also included in the squad, following his return from Ireland Under 20's duty.
Forwards: Tom Court, Bryan Young, B.J Botha, Declan Fitzpatrick, Nigel Brady, Andy Kyriacou, Ryan Caldwell, Ed O'Donoghue, Dan Tuohy, Thomas Anderson, David Pollock, Willie Faloon, Chris Henry, Robbie Diack
Backs: Cillian Willis, Isaac Boss, Paul Marshall, Ian Humphreys, Niall O'Connor, Paddy Wallace, Darren Cave, Ian Whitten, Timoci Nagusa, Andrew Trimble, Simon Danielli, Jamie Smith, Nevin Spence
The team will be announced at 12 noon on Thursday.