Top 5 Most Popular Cars to Modify in the U.S. (and How to Upgrade Them)
The aftermarket automotive scene in the U.S. is one of the most vibrant in the world. From muscle cars to imports, enthusiasts love customizing their rides for performance, style, and individuality. But which cars are the most popular to modify—and what are the best first upgrades? Here’s a look at the top five platforms dominating the American aftermarket.
1. Ford Mustang
As one of the most iconic muscle cars, the Mustang tops nearly every modification list. Owners typically start with bolt-on performance upgrades such as a cold air intake or cat-back exhaust system. Wheels are another must, giving the Mustang a more aggressive stance while enhancing handling. Suspension upgrades, like lowering springs or coilovers, are also a favorite for improving cornering while dialing in a sleek, track-ready look.
2. Chevrolet Camaro
Close behind the Mustang is its long-time rival, the Camaro. Known for its V8 power, the Camaro responds exceptionally well to exhaust upgrades that unlock more sound and horsepower. Enthusiasts also swap out factory wheels for lightweight aftermarket options that reduce rotational mass and sharpen acceleration. Pairing new wheels with upgraded brakes ensures the Camaro can stop as fast as it goes.
3. Dodge Charger & Challenger
Mopar fans love pushing their HEMI-powered Chargers and Challengers to the limit. One of the most popular modifications is an upgraded intake and exhaust combination, giving these cars a deeper growl and stronger top-end performance. Suspension upgrades are also high on the list, as lowering these larger vehicles dramatically improves handling while maintaining muscle car presence. For those chasing serious performance, big brake kits are a must-have addition.
4. Subaru WRX & WRX STI
On the import side, the Subaru WRX and WRX STI hold a special place in the aftermarket community. These turbocharged sedans are known for their rally-inspired performance, and most owners start with intakes, exhaust systems, and tune packages. Suspension modifications, like sway bars and coilovers, improve the WRX’s handling for both street and track driving. Lightweight wheels not only cut down on unsprung mass but also highlight the aggressive, rally-ready look Subaru fans love.
5. Honda Civic
Few cars are as customizable as the Honda Civic. Whether it’s the classic Si or the modern Type R, Civics have endless aftermarket support. Enthusiasts often begin with lowering springs and wheels for a sportier stance. Exhaust systems are another go-to, offering both improved sound and performance. For those looking to push beyond simple bolt-ons, turbo and supercharger kits are widely available and can transform the Civic into a serious performance machine.
Final Thoughts
Whether you’re driving American muscle or a turbocharged import, upgrading your vehicle is one of the most rewarding aspects of car ownership. Wheels, exhaust, and suspension remain the top three entry-level mods across nearly every platform, offering the perfect balance of style and performance. The key is choosing quality parts designed to fit your specific make and model—ensuring your car not only looks the part but performs at its best.