Walden entered V8 Supercars in 2004, running an older-specification ex-Glenn Seton Racing Ford Falcon AU.

Running with support from Bap Romano and Ford Performance Racing, Walden contested six of the thirteen events – failing to qualify for the Winton round and crashing out of the Bathurst 1000.

AVESCO stripped the team of their licence at the conclusion of the season, handing it over to Perkins Engineering.

In 2008, Walden re-secured his V8 Supercars REC with the intention of operating a Holden Commodore VE.

[1] Walden was employed as a factory Radical Sportscars driver and manager in the late-2000s, and later ran in the World Time Attack Challenge and Porsche Carrera Cup Australia.