Like pacesetter Michael Schumacher, former World Champion Sir Jackie Stewart will power down the straight of the fabled Indianapolis Motor Speedway.

But on Sunday, the 64-year-old won't be at the wheel of a Formula One car.

He'll not don a helmet and driving suit, but rather a Glengarry and tartan pants. And the Scot will march, not race, ahead of more than 300 bagpipers.

The international 'Pipefest 2004' takes place in the US city this week.