Wallen has been threatening to win a race since beginning his career and he followed through on that promise in style at Pukekohe Park on Saturday.
Bred and raced by Gerry Harvey, the Shane Crawford-trained son of Tarzino also provided his close relative with a timely pedigree update.
His half-sister by Redwood will be offered by Westbury Stud as Lot 865 during the upcoming New Zealand Bloodstock National Yearling Sale.
Wallen had finished third on debut before three runner-up finishes so his breakthrough victory over 1600 metres was both expected and deserved.
He had to do it the hard way though after being shuffled back to third last on the fence before angling off the rail 600 metres from home.
The four-year-old wound up powerfully under jockey Ryan Elliot to open his account with the promise of more to come.
“It’s good to get that win under his belt and he will get out over more ground,” Crawford said.
“He’s really honest and puts in, I think he will reach a pretty decent mark.”
Wallen has been patiently handled and that approach is expected to continue to deliver strong results.
“He came into my care as an early three-year-old and needed time to strengthen and develop and the rewards will come,” Crawford said.
Wallen is a son of the More Than Ready mare Nouveau Amour, a half-sister to the Listed Hareeba Stakes winner Jolie Blonde, and a granddaughter of the G1 AJC Sires’ Produce Stakes winner Isolda.