Rin Tin Tin was well back in the field before looping the bunch with 600m to go, to draw level with the pacemaking Seventh Heaven.
The two fought a thrilling duel down the home straight before Rin Tin Tin prevailed by half a length.
In the last harness race at Forbury Park, Waikouaiti trainer Amber Hoffman collected her 114th win at the course with Dodgethebullet.
The final race for trotters was won by Tweedledee, from Mataura trainer Lyndon Bond.