Growing Empire is one of the key players in a $1mil Black Caviar Lightning (1000m) that also features fellow colts Switzerland, Traffic Warden and Espionage, along with Benedetta and Growing Empire's stablemate I Am Me.
The Black Caviar Lighting has been Growing Empire's goal ever since the Coolmore Stud Stakes, when he dead-heated with Lady Of Camelot for third, albeit three lengths behind Switzerland, but Maher is confident the winner of four of his eight starts still has room to improve.
"He's only going to keep improving, he's a raw horse, and he still did little things a little bit wrong last time around so he's still going to keep furnish mentally and physically," Maher said.
The Black Caviar Lightning will be the first start for I Am Me since finishing towards the rear in the $3mil Russell Balding Stakes (1300m) in early November, but that daughter of I Am Invincible won the Group 3 Concorde Stakes (1000m) and Group 2 The Shorts (1100m) earlier in the campaign.
I Am Me has had two 800m trials at Cranbourne this time, for fifth and a fourth placings when not knocked around, and Maher is confident she is primed to run well fresh.
"She was very good early last preparation, 1000 metres suits and she has come up really well," he said.
"Her trial the other day was great and she can mix it when she's right."
The Black Caviar Lightning is the feature event of Saturday's Flemington card, which also feature the Group 3 C S Hayes Stakes, for which Goldrush Guru, Henlein and Feroce are among the entries.