Seemingly inspired by the tussle, the Tigers came out with a renewed purpose after the break.
Within minutes, Blamire was able to find his jumper five metres out and with the backs adding their weight, the Tigers powered over. The hooker ultimately emerging with the ball.
Having attained dominance in the scrum, the Tigers then struck again. Following strong running from Solomone Kata, Gabe Hamer-Webb and Henderson combined down the wing, to send the lock over the whitewash.
The Tigers were in the ascendancy and soon had a third through Carnduff, who drove over after a short-range pass from the imperious Joe Heyes as the Saints’ defence tired.
Steward then put the gloss on the victory. The full-back stepping Archie McParland to grab what had appeared an unlikely try bonus point, to the delight of the home fans.
The result leaves the Tigers in second behind Gloucester, while Northampton drop to fourth.
Leicester: Steward; Radwan, Wand, Kata, Hamer-Webb; Searle, van Poortvliet; Van der Flier, Blamire, Heyes; Henderson, Chessum (c), Wainwright, Carnduff, Cracknell.
Replacements: Asiata, Haffar, Hurd, Thompson, Moro, Whiteley, Bailey, Pearson.
Northampton: Pater; Freeman, Hutchinson, Dingwall (c), Hendy; Smith, Mitchell; Iyogun, Langdon, Kundiona; Coles, Prowse, Kemeny, Pearson, Pollock.
Replacements: Smith, Fischetti, Neculai, van der Mescht, Lockett, Chick, McParland, Sleightholme.
Yellow Card: Lockett (69).
Referee: Craig Maxwell-Keys