Bankstown will meet UNSW in the Kingsgrove Sports Twenty20 Cup decider after both teams recorded emphatic preliminary finals win on Sunday.

The Bulldogs made short work of Parramatta in the Sydney Thunder conference play-off at Bankstown Oval, bowling the visitors out for 131 and passing them for the loss of just three wickets in the 16th over.

UNSW was set 151 to win by Gordon at Chatswood Oval and did it comfortably, reaching its target with seven wickets and 10 balls to spare to claim the Sydney Sixers Conference title.

The Bumble Bees will travel to Bankstown Oval to take on the Bulldogs in the final on January 26.

Neither club has lifted the T20 trophy, ensuring a first-time winner on Australia Day.

The winner pockets $12,000 while the runner-up collects $4000.

NSW Premier Cricket T20 - Sixers Conference Highlights - UNSW v Gordon

Bankstown will go into the game as slight favourite after taking down the dangerous Parramatta so convincingly.

Parramatta opener Ben Abbott got his team off to a flying start, cracking four sixes and a four in scoring 28 from just nine balls.

But the Dogs stayed in the fight, taking wickets at regular intervals to keep the hand-brake on the total.

Parramatta slumped to 5-58 before Luke Dempsey (32) and Jacob Workman (28) ensured the bowlers would have something to defend, reaching 131 in the final over.

Bankstown spinners Ben Le Bas (4-21) and Ben Taylor (3-21) did the bulk of the damage.

The Bulldogs lost their first wicket at 25 but an 85-run second wicket partnership between captain Daniel Solway (40) and Zeeshaan Ahmed (53) ensured it was a comfortable journey to the victory target.

Gordon skipper Tym Crawford fell on the first ball of the day but his side recovered to post 6-150 against UNSW, mainly due to Nathan Doyle's 74 from 54 balls and handy contributions from Lachlan Barnsley (34) and Max Newman (26).

The Bees were 1-3 early but were untroubled from there as the in-form Adrian Isherwood (62) and Jack Attenborough (57) put on 115 for the second wicket.

The visiting side lost two more wickets before passing the Stags' total on the second ball of the penultimate over.

Full scores here.