The victory at the Nyayo National stadium was also a perfect gift for the country's celebrations of 50 years of independence and ended Kenya's 11-year wait for the regional title.
Kenya threw everything into attack from the start and made various raids from the left wing where Edwin Lavatsa and Clifton Miheso were very impressive.
Wanga should have given them the lead in the 15th minute but his feeble shot at the goal was punched back into play by the Sudan keeper Ali Abdirahman.
Abdirahman stood no chance when Wanga headed home a David Owino cross from a tight position in the 34th minute to send the home crowd into a frenzy.
The Kenyan defence stood solid and succeeded in cutting out the Sudanese attack led by winger Salah Ibrahim down in the middle.
Sudan did not have the opportunity to settle in the match.
Striker Nadir Eltayeb squandered their best chance to level in the 38th minute when he shot wide past the advancing Kenyan keeper.
The industrious Wanga added his second goal and the third of the tournament in the 68th to finish off the opposition and cap the hosts' most successful campaign.