The ninth Cannonball fundraiser drives off on Friday at 10am from the 3 Arena in Dublin, on a run that takes it through Dublin, Kinsale, Limerick, Galway Plaza, Claremorris, Sligo, Mullingar and Moneygall to finish on Sunday in Kilkenny.
Some 190 supercars will be involved, and the organisers are expecting around 160,000 spectators between the various stops, eager to see models from exotic brands like McLaren, Lamborghini, Ferrari, Aston Martin, Porsche, Maseratti, Rolls Royce and Bentley.
Cannonball has raised almost €900,000 for Irish charities and this year, proceeds will go to Make-a-Wish Ireland, a children's charity that grants magical wishes to children between the ages of 3-17 years with life-threatening medical conditions.
Renewable energy provider Hone is the headline sponsor for 2017, along with Audionetworks and the AMA Music Agency. Other sponsors include include Manhattan Popcorn, Advance Security, Krystle, Top Oil, Asystec, Mellett Electrical, Supermacs, Autokey, Karl Goodwin Motors, Monster, AB Signs and StitchMagic.