A son of dual Derby winner Rebel Raider from former local sprinting mare Just Sybil - who took on Black Caviar in a Group 1 Sangster Stakes - Rebel Racer was having just his third start for the stable after being recommended as a jumping prospect and bought from an online auction for just $35,000.
"I can't believe it's just happened,'' Amy Yargi said.
"I bought him to win a maiden hurdle at Warrnambool, not even joking."
"He's just kept improving and was crying out for a trip.
"I've got to thank Mark Kavanagh (previous trainer), he told me to go and buy him, he probably didn't want me to go and win an Adelaide Cup with him,'' she said.
Taken straight to the front by Craig Newitt, Rebel Racer looked in trouble approaching he home turn when the big names made their runs and wall of horses loomed large.
"He just got into a beautiful rhythm,'' Newitt said.
"He pricked his ears, every time I asked him to improve, he did. I got to the 1400m and started to build. I wanted to be going before the backmarkers started to make their runs.
"I had some proper horses outside me, on their class, they looked above him, but I was in a spot to make them carry their weight.
"He was last man standing, he just kept ticking over. From the 1200m mark he never went any quicker, and he didn't go any slower,'' he said.
Symon Wilde's Aurora's Symphony looked the winner when he headed Rebel Racer and was game in defeat with the Phillip Stokes-trained Amade 1.2 lengths away in third spot.
Perth raider Stafford's Lad made good ground from the back to finish fourth in front of Highland Jakk who jumped a $5 race favourite and looked to have every chance.