Automobile customization refers to the process of modifying a vehicle to reflect the owner's personal style or improve its performance. This can include changes to the exterior, such as paint jobs, decals, and body kits, as well as interior modifications like new upholstery and upgraded sound systems. Additionally, customization can enhance a vehicle's functionality through performance upgrades, such as improved suspension, exhaust systems, and engine tuning. Enthusiasts often seek out parts from brands like Hennessey or Roush to achieve their desired look and performance, making each customized automobile unique to its owner.