A red-card to Sam Arnold proved costly for Munster as Ulster bounced back from a 17 point deficit to win the Pro 14 clash in Belfast with a 24-17 margin.
Ulster ran a six-try riot as they boosted their chances of making into the play-offs of the European Champions Cup with a 52-24 victory over Harlequins at Kingspan Stadium on Friday.
Harlequins chances of progressing to the play-off of the European Champions Cup suffered a major blow as they succumbed to their third consecutive defeat after beaten by Ulster 5-17 at Twickenham Stoop on Sunday.
Christian Leali'ifano scored a late try but missed out on the conversion as Ulster came from behind to draw the Pro 14 encounter 32-32 against Dragons in Newport on Friday.
Replacement Andrew Trimble scored the decisive try in the closing stage as Ulster came from behind to register a 23-22 win over Benetton Treviso at Kingspan Stadium on Friday.
Ulster came up with a clinical second half performance as they came from behind to win the European Champions Cup opening clash against Wasps with a 19-9 margin at Kingspan Stadium on Friday.
After rounds three and four Ulster Rugby and Glasgow Warriors have maintained their 100% starts to the season while the Cheetahs showed plenty of bite on their home turf.
Ulster maintained their unbeaten record in the ongoing 2017-18 Pro14 rugby season after thrashing the Dragons by 52-25 at the Kingspan Stadium on Friday to move into the top spot of the Conference B.