Lake Illawarra opener Kerrod White made it back-to-back centuries in six days against Oak Flats to lead the Lakers to victory in Saturday's one-day final at Geoff Shaw Oval.
South Coast's powerhouse clubs delivered a batting feast, scoring a combined 513 runs for just nine wickets lost - and it was the Lakers top order which proved too strong.
Batting first, Oak Flats opener Kieran Gray blasted 131, including 16 boundaries and two sixes to guide the Rats to 7-256.
Gray and opening partner Michael Arblaster (58) put on 144 in 32 overs.
White then backed up his 104 against the Rats in the SCG Country Cup six days earlier to smash 125, including 20 boundaries.
White and Tony McCabe (54) put on 142 for the opening wicket and with Scott Ulcigrai (64 not out) in great touch, the Lakers won by eight wickets with almost five overs to spare.
"This is one of the most satisfying wins of my career," Lakers skipper Shane Cody said.
"Two really good sides going head-to-head on an absolute batting road; it was a great contest. Kerrod [White] and Kieran [Gray] are too good for this comp. It's a pleasure to see them bat the way they do.
"Coming off the ground I thought chasing 256 that they [Oak Flats] were 20 runs short and knew if we batted to our potential we'd get the runs and that's how it played out."
Cody said his side's batting form was timely with the Lakers taking on Corrimal in the SCG Country Cup quarter-finals at Croome Road on Saturday.
The winner advances to Sunday's semi-final with victory earning a spot on the January 12 final at the SCG. Other Cup quarter-finals are Hamilton-Wickham vs Terrigal, Albury Wodonga vs Tamworth and Queanbeyan vs Dubbo.