O'Gara kicked 14 points in treacherous conditions at Thomond Park and set up the decisive try for Denis Leamy as Munster surged to the top of Pool Five.
The 19-3 victory secured the European heavyweights an unprecedented 10th successive season in the Heineken Cup quarter-finals, ending Wasps' defence of the title in the process.
And it was that proud record which spurred on O'Gara, whose job was made all the easier by the work of a dominant pack.
"I don't want to speak about my own performance but one thing I will say is that I've really enjoyed the captaincy," he said.
"During the week I was well aware that if we didn't win I'd be the first Munster captain in a decade to preside over failure to reach the quarter-finals.
"That was pressure on my shoulders so before we ran out I asked the forwards for a big performance and they delivered.
"The sum of Munster's parts is always greater than the individuals but there are some cracking athletes at this club.
"When you factor in that passion, desire and will to win for each other, it's a good formula."