After 21 regular season rounds and a fun finals series, Bulls' men and Tornadoes Black's women have come out on top.
A capacity crowd cheered throughout the Bunbury Basketball Association men's and women's grand finals on Saturday night.
Flourishes from grand final MVP Jasmine Barrett (top scoring with 22, including five three-pointers) and Kristy Larsen (15) helped Tornadoes Black's women's side to a commanding 24 to 14 lead at the first change.
The Tornadoes side continued its form in the second quarter, while Dunsborough struggled to find its footing.
Trailing by seven at half time, the Oilers fought their way back with support from fellow GF MVP Dana East (25, six from behind the three-point line) and Adele East (20).
With Tornadoes Black ahead at three-quarter time (52 to 46), both teams prepared for a nail-biting final quarter.
Tornadoes Black remained in front throughout the term, with Dunsborough never too far behind.
A spectacular three-point effort from Adele East locked the scores at 67-all with just two minutes to go.
A three-pointer from Barrett and a free throw from season MVP, and South West Slammers star, Ebony Bilcich (16) saw Tornadoes Black claim a 71 to 67 win.
The Bulls' men's team became back-to-back premiership winners following a sublime performance against Tornadoes Black.
Three-pointers from Travis Durnin (25), Chris Douglass (25), and Paddy Phillips (12) gave Bulls a commanding lead early in the first term.
Ahead by 14 at quarter time, the reigning premiers continued their assault in the second.
Behind 48 to 25 at the main break, Tornadoes Black fought to catch up in the second half.
The Tornadoes side remained in the contest thanks to Jason Smith (20), Matthew Leary (13), and Nathan Van Dijk (also 13).
Despite losing the second half (43 to 46), Bulls still managed to secure a resounding 91 to 71 victory.
Seven players reached double figures during the decider.
Perth Wildcats legends Ricky Grace and Cal Bruton, and Wildcats' original owner Bob Williams, were impressed by the performances from all-four sides.
"There were some great skills, some high intensity, a lot of drama," Grace said.
"I have always been impressed with the basketball here in Bunbury.
"Full credit to the Bunbury Basketball Association and all of the basketball associations in the South West, because they do a great job."
The Slammers will take on East Perth Eagles in SBL 2019 - Round One this weekend.