The Ulster duo of Paddy Jackson and Tommy Bowe ensured the home side a comfortable 26 - 13 win over the Scarlets as the powerhouse of Stephen Ferris returned to the turf at Ravenhill after more than a year away.
Tom Court made it the crucial four tries for Ulster, late in the last seconds to give the home side the bonus point.
Stephen Ferris joined Ulster in the second half of the RaboDirect Pro 12 - making an instant impression after more than 15 months away.
Ulster went into the second half 21 - 10 in front, following two stunning tries from Paddy Jackson and another from Tommy Bowe.
Jackson was the man to watch during a thundering 40 minutes - opening the scoring with a try in the 15th.
And just three minutes later, some great lines from the 22-year-old fired a strong pass to Tommy Bowe - giving Ulster a second.
Man of the match Paddy Jackson added Ulster's third try in the 34th, thanks to some stunning running from Bowe.
Ulster's Callum Black was forced out due to injury, with Tom Court coming on as his replacement.
A late try from the Scarlets' Gareth Davis, with a conversion from, Olly Barkley put the first points on the scoresheet for the Welsh side.
Scoring came late in the second, with a Barkley penalty for the Scarlets opening proceedings.
There was no scoring again until a last minute try from Ulster's Tom Court - securing the win and extra point.
Head coach Mark Anscombe said the side looked like "rockstars" in the first half.
He also welcomed Stephen Ferris' return.
"He is huge and a big part of Ulster. To see him after all the hard work he's been through," he said.
"The crowd love him. Hopefully the ankle pulls up well tomorrow."
Stephen Ferris made his Ulster comeback in the second half after suffering a host of setbacks on the rocky road to recovery.
The 28-year-old flanker rejoined the squad over a year after he was helped off the Ravenhill turf due to injury back in November 2012.
Ulster face Edinburgh at Murrayfield next Friday.
Ulster XV and replacements facing Scarlets 15-9): J Payne, T Bowe, D Cave, S McCloskey, R Scholes, P Jackson, R Pienaar; (1-8): C Black, R Herring, J Afoa, J Muller (Captain), R Diack, R Wilson, S Doyle, N Williams; Replacements (16-23): N Annett, T Court, R Lutton, L Stevenson, S Ferris, M Heaney, C Gilroy, R Andrew.