Coach Alan Solomons praised the way the side played as they beat Cardiff last weekend in Round 5, and has kept faith with the fifteen as the Pool stages draw to a close.
And he knows that this weekend's game really is make or break, they face a huge task in their bid to qualify for the quarter-finals of the Heineken Cup.
The Heineken Cup winners of 1999 will only go through if they beat Northampton, and in the process score four more tries than their opponents, but if they score three tries more, they must beat them by 26 points.
But Northampton have not capitulated to that extent all season. Northampton are top of the pool with eight points, Biarritz and Ulster are both on six points thanks to their three victories.
Ulster: B Cunningham; J Topping, R Constable, S Stewart, S Coulter; D Humphreys, N Doak;R Kempson, M Sexton, S Best, G Longwell, J Davidson, A Ward (capt), N McMillan, T McWhirter.
Replacements: J Fitzpatrick, P Shields, M Blair, R Nelson, K Campbell, J Cunningham, S Young