Saurashtra, trailing the home team by 207 runs in the first innings, were shot out for a pathetic 82 in less than three hours and 36.3 overs, 41 minutes after tea.
Mumbai, thus, clinched their 40th national title in 44 appearances in the summit contest and their first after two blank seasons.
Agarkar snapped up four wickets for 15 runs while his younger teammate Kulkarni grabbed 5/32 to complete splendid match figures of nine for 56.
The home team pace duo finished off the lop-sided contest with their fiery first spells to help Mumbai regain the crown after a gap of two seasons by sharing six wickets equally.
(with inputs from PTI)
