Teenager Jordan Williams scored two tries on his full debut for the Scarlets as they completed a second-half comeback to defeat Connacht 24-11 in the RaboDirect PRO12.
Scarlets, who had tallied 10 tries in their previous two RaboDirect PRO12 outings, were held scoreless in a first half that ended 8-0 in Connacht's favour.
Miah Nikora put the hosts ahead with a penalty and then set up Eoin Griffin for a 39th-minute try to leave Connacht in charge.
But the Scarlets rediscovered their scoring touch immediately after the break as Williams, who turns 19 next Thursday, and George North cut through for three tries in a superb 11-minute spell. Nikora's second penalty reduced the margin to 17-11, but the Scarlets clinched a late bonus point when stand-in captain Jonathan Davies ran in an intercept score.