Modifying cars with a sledgehammer. Carolyn Stewart presents brutal banger racing action from Nutts Corner, plus progress in the build-off challenge to turn a grubby road car into a gleaming show car. Round two in the Petrolheads Challenge Cup.

The show which modifies cars for speed sees Carolyn Stewart at a track skills day in Kirkistown, where she makes Northern Ireland racing history in a Reliant Robin. Meanwhile, the pressure is on for two teams as they struggle to turn a road car into a show car.