Sporting Kansas City will play Houston Dynamo over two legs for a place in the MLS Cup final.
Sporting Kansas City have overcome New England Revolution to seal their progress into the MLS Eastern Conference final.
Tonight's hosts trailed 2-1 following Sunday's first leg, but goals from Aurelien Collin, Seth Sinovic and Claudio Bieler have turned the tie around.
The deadlock was broken five minutes before half time, with Collin in the right place at the right time to finish from close range.
Dimitry Imbongo Boele edged the Revolution back in front with just over 20 minutes left to play, but 10 minutes later Seth Sinovic latched on to Graham Zusi's flick-on to force extra time.
With under seven minutes remaining, Benny Feilhaber found Bieler inside the box to put the home side 4-3 up on aggregate.
Peter Vermes's men will take on Houston Dynamo for a place in the MLS Cup final, with the first leg taking place on November 9.
Result: Collin strike earns Kansas win over Houston >