This time around Gregor Townsend's side face Munster at the Kingspan Stadium on Saturday in an attempt to claim their first ever PRO12 title.
And scrum-half Pyrgos admits victory would be reward for how far the club have come under Townsend's guidance.
"It would mean everything to win this final. We are desperate to go over there and win this tie. We have worked really hard over the last few years," he said.
"In the five years I have been here I have seen the club grow year on year - we have got better and better.
"We have given ourselves another chance to get this title and we really want to go over there and put in a massive performance for everyone associated with this club.
"When I joined, we had a lot of rebuilding to do. A few guys moved on, as happens in sport. We had a lot of guys who I had played age-group rugby with coming in, but not a lot of experience at professional level.
"However, I always knew it was a talented bunch of guys with the development of players - Gregor Townsend and Sean Lineen have developed players really well - and we have managed to bring in some quality additions from outside the group, which has really helped us as well.
"We have a great competitive squad of guys. Gregor said we had used 50 players this season, which shows it's a massive squad effort to get where we are."
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