Joining forces when the airmen were in a spot of bother at three wickets down for 27 runs in the fifth over, the two batsmen from Tamil Nadu took the fight to the rival camp and shared an unconquered 92 run partnership to see their side through with 15 deliveries to spare.
Earlier, sent into bat by Air India skipper Suresh Raina, CAB put on board a modest 118 for eight in the 20 overs. Wickets fell at regular intervals for the Bengal side as a good partnership eluded them at M Chinnaswamy Stadium.
CAB Captain Deep Dasgupta top-scored for his team with a 26-ball 30 with four fours.
CAB was in trouble early with three of their batsmen back in the pavilion with just 11 runs in the third over, including Rohan Gavaskar who was run out for four.
Contrary to expectations, it wasn't bang-bang from the word go and batsmen were seen struggling on a pitch that assisted bowlers.
Raina was pick of the Air India bowlers taking three wickets for 13 runs in four overs.
CAB appeared to be on top for a brief while as their bowlers picked up three quick wickets, including that of Raina for six but Kaarthick (61m, 47b, 3 fours, 1 six) and Sriram (51m, 37b, 2 fours) made sure Air India flew high.
Brief scores: CAB 118 for 8 in 20 overs (Dasgupta 30, Manoj Tiwari 25, Sourasish Lahiri 19 not out; Raina 3/13, R P Singh 2/15, Siddharth Trivedi 2/24) Vs Air India 119 for 3 in 17.3 overs (Kaarthick 62 not out, Sriram 30 not out, Ranadeb Bose 2/15, Ashoke Dinda 1/26).