The EP Kings edged the Pumas 26-25 in the Currie Cup First Division final in Port Elizabeth.
After it was confirmed earlier this year that they would be elevated to Super Rugby in 2013, the Kings are now buoyed further after an unbeaten campaign. They will now contest the promotion-relegation play-off for entry into the Premier Division.
They turned in a strong second half showing after trailing 13-10 at the break, and even though the Pumas outscored them four tries to two, they refused to relent, flyhalf George Whitehead kicking 11 points courtesy of a conversion and three penalties.
The hosts were made to endure a nervy last few minutes when Pumas fullback Coenie van Wyk scored a converted try with a minute left to play but the Kings managed to hold on for the win.