Among the most popular car modifications are performance upgrades and aesthetic changes. Air filters, particularly cold air intakes, are commonly used to improve engine noise and turbo flutter, with potential minor performance and fuel efficiency gains. Performance exhaust systems reduce back pressure, allowing the engine to expel exhaust gases more efficiently. These modifications not only enhance performance but also provide a more engaging driving experience for car enthusiasts. Cosmetic modifications are also highly popular. Adding spoilers, changing wheel accessories, and applying light lens tints are frequent choices. Alloy wheels, which make up 21% of all modifications in the UK, are sought after for their performance and aesthetic benefits. These modifications can significantly alter the car’s appearance and often require specialized insurance coverage to ensure the modifications are protected.