It's the second Wild Bunch flag she's had - the first faded. Wild Bunch is a class of drag racing car.
Drag racing involves two cars competing against each other over a quarter-mile straight. She can now cover the distance in 10.6 seconds from a standing start, but for the medical centre practice manager, the highlights are the laughs and having fun.
Before the green light, the drivers do a burnout to warm up the tyres and provide better grip. There's no tread on the slick back tyres.
Imrie-Southee says the burnouts are her favourite part of drag racing; she could do them all day but would need shares in a tyre company.
Her husband Brad, son Thomas and friends support her in her Super Sedan class racing. They know her routine - she starts the morning with a "nervous pee" and can't face any food. Once she's got the first race out of the way, she's fine.
Imrie-Southee says her first time on the track was a dream come true, even though she admits to having felt ill. A good day for her is if they can bring The Reaper home in one piece.
Strapped into a five-point harness in a roll cage, wearing a double layer firesuit and helmet, it's hot work coaxing The Reaper to give her best each race.
Imrie-Southee says she's always loved cars - particularly the speed, and the sound of a V8 engine is awesome.
At that, her Wild Bunch flag acknowledges everyday motorists passing by.
