Best known as a Supercars Championship competitor, Bargwanna raced in the series for 25 years, the pinnacle of which was winning, with Garth Tander, the 2000 Bathurst 1000 in a Garry Rogers Motorsport prepared Holden Commodore.

His 1995 showing allowed him to attract the budget to run a campaign with late model equipment in 1996 and he finished second in the championship to Van Diemen's factory supported driver, David Besnard.

A move to Formula Holden resulted in second place in the 1997 Australian Drivers' Championship with SH Racing.

In 2006, Larkham Motor Sport merged with WPS Racing, the team folding immediately prior to the 2008 season and leaving Bargwanna without a full-time drive.

[3] In 2011 Bargwanna drove a Brad Jones Racing Commodore alongside his junior open-wheel rival, Jason Bright.

His father, Harry Bargwanna, himself an Australian racing driver, owns and operates a mechanical repair shop in the Southern Sydney suburb of Engadine.

Bargwanna owns four Red Rooster franchises in Hampton Park, Fountain Gate, Hastings, and Pakenham West.