Yasmin and Eslam are a sporty brother and sister from Wales who have many complaints when it comes to the family car they call Big Red Hulk. There is a lingering pongy odour from their dirty sports kit, a wing mirror falling off, and the seats are going mouldy. The family cannot afford a new car, so unless they want to start getting the bus everywhere, Big Red Hulk is in dire need of a makeover. Step in Ali-A and his supercharging team.

Yasmin and Eslam meet Ali-A at Superchargers HQ along with Mum and their stepdad Steve. They show Ali-A the worst offending areas, including a random papier-mache deer hiding in the back of the car amongst the other junk. They brainstorm makeover ideas with Ali-A, but Mum and Steve can't see the designs.

Car vlogger Sideways Sid has a surprise for Yasmin and Eslam - he takes them to Silverstone racetrack, where they are met by Superchargers mechanic and racing driver Rebecca before her next race! The brother and sister get an exclusive tour of her car and are buzzing with excitement, but how will they transfer their sporty-themed inspiration onto Big Red Hulk?

Back at the workshop, Rebecca helps the siblings make Big Red Hulk roadworthy again when they change the worn-out tyres and fix the horn.

Now that their family motor is completely safe, Yasmin and Eslam can finally start putting their big and bold design ideas into practice. But will Mum and Steve love or hate its new look? Show less