Custom car builds involve modifying or creating vehicles to meet specific preferences or performance goals. This process can include changes to the engine, suspension, bodywork, and interior, allowing car enthusiasts to personalize their vehicles. Builders often use aftermarket parts or fabricate unique components to achieve the desired look and functionality. These projects can range from simple modifications, like new paint jobs or upgraded wheels, to extensive overhauls that transform a car's entire design. Popular platforms for custom builds include classic cars, muscle cars, and sports cars, with builders often showcasing their work at events like car shows or online communities.