Sent to the boxes as $1.90 favourite after her brilliant win in last week's heat, Arsonist again took full advantage of box 1 to lead through the first turn.

Recent group 1 Silver Chief winner Enry Walt recovered from a moderate start to follow Arsonist through the turn and the pair soon cleared away from the pack.

The imposing Enry Walt reduced the margin to a length coming off the back as the two turned for home. Arsonist stuck to the rail as Enry Walt drifted wide and the former South Australian raced to the line to take the $25,000 first prize in a slick 29.88seconds.

The win maintained Arsonist's unbeaten start to her racing career, having now saluted in all four of her races and amassed more than $32,000 in prizemoney.

"I'd like to give a special thanks to [trainer] Heather Collins and her family for all the work they've done with this little girl of mine since I brought her over [to Victoria] a couple of months ago," ecstatic owner Nathan Rooney said.

"I couldn't have imagined standing here after four wins from four starts but she's going exceptionally. Hopefully, this will also help launch Heather and Steve in Victoria."

The win was Heather Collins' first group race feature and proved just reward for making the move from South Australia to Victoria several years ago.