what cars can be used in nascar

[OVictoria]

NASCAR vehicles are not standard production cars you can buy from a dealership. They are custom-built, purpose-built race cars based on a strictly regulated Next Gen chassis. For a car model to be eligible, a manufacturer must submit it to NASCAR for approval, and it must pass a rigorous homologation process. Currently, three models are approved for the premier Cup Series: the Toyota Camry, the Ford Mustang, and the Chevrolet Camaro.

While these share names with road cars, the similarity is almost entirely in the body shell. Underneath, every car uses the same universal chassis, safety cell (Next Gen chassis), independent rear suspension, and a spec 5.8-liter V8 engine. The key differentiators are the body shapes and manufacturer-specific engine components. The bodies are designed with aerodynamic parity in mind, meaning NASCAR works to ensure no single model has a significant speed advantage.

The approval process is extensive. Manufacturers use wind tunnels and computational fluid dynamics to design bodywork that fits within NASCAR's tight aerodynamic targets. The final product is a silhouette racer—it looks like the production car but is a purebred racing machine built for safety and high-speed competition on oval tracks.

Here is a comparison of the key specifications for the current NASCAR Cup Series models:

Specification	Toyota Camry TRD	Ford Mustang	Chevrolet Camaro
Competition Debut	2007	2019 (Current Gen)	2018 (Current Gen)
Engine Displacement	5.8L (358 cu in) V8	5.8L (358 cu in) V8	5.8L (358 cu in) V8
Horsepower	670 hp (on most tracks)	670 hp (on most tracks)	670 hp (on most tracks)
Transmission	5-speed sequential	5-speed sequential	5-speed sequential
Chassis	Next Gen Spec Chassis	Next Gen Spec Chassis	Next Gen Spec Chassis
Fuel Capacity	20 gallons	20 gallons	20 gallons
Weight	3,200 lbs (minimum)	3,200 lbs (minimum)	3,200 lbs (minimum)

[LoganDella]

Forget what you see in the showroom. The Toyota, Ford, and Chevy badges are basically just branding. The real car is a single, spec chassis that every team builds from. It’s all about the body shape meeting NASCAR’s aero rules. So, while it’s cool to cheer for a Camry, you’re really cheering for the team and driver that can make the best out of the exact same equipment as everyone else. The manufacturer competition is more about engine parts and engineering support.

[DeRebecca]

The heart of a NASCAR is its Next Gen chassis—a universal, super-safe carbon fiber and steel frame that every team uses. Manufacturers then design a body that fits over this chassis, but it has to be approved to ensure no one has an aero advantage. The engines are also heavily regulated V8s. So the "car" is a mix of a spec racing platform and a manufacturer-branded shell. It's engineering within a very tight set of rules to create close, competitive racing.

[VanPreston]

It's a common misconception. You can't just modify a street-legal Mustang to race on Sunday. The process is the opposite: manufacturers design a race car from the ground up to look like their production model for marketing purposes. The entire drivetrain, suspension, and chassis are built to one set of NASCAR rules. The "car" is defined by a rulebook, not a factory production line. This ensures the racing is about team strategy and driver skill, not which manufacturer built a better road car.

[JocelynLee]

From a technical standpoint, the cars are defined by NASCAR's homologation rules. A manufacturer like Toyota will develop a body-in-white (the basic body structure) that is tested for aerodynamic parity. This body, along with certain proprietary engine components, is what gets "approved" for competition. The rest of the car—the chassis, suspension, transmission, and safety systems—is a controlled spec part supplied by independent vendors. This balance between manufacturer identity and standardized components is crucial for cost control and maintaining competitive balance across the field.