The NASCAR Xfinity Series in 2025 continues its legacy as the proving ground for future Cup stars, grassroots talent, and a fan-favorite alternative to the top-tier Cup Series. The cars remain visually and mechanically distinct from their Cup counterparts, with an emphasis on driver skill and old-school racing characteristics.

While Cup has moved fully into the Next Gen era, the Xfinity Series preserves a more traditional stock car feel, offering fans a mix of nostalgia and raw excitement. In 2025, the series still uses the composite-bodied "Generation 7" Xfinity cars introduced in the late 2010s, refined over time with minor safety, aerodynamic, and durability updates.

Chassis: Steel tube frame chassis built to NASCAR specifications

Body: Composite panels (resin-based, multiple-piece design)

Durable and flexible, resistant to minor contact

Standardized for all manufacturers to ensure parity

--------Engine and Drivetrain---------

Engine: Pushrod V8, naturally aspirated

Horsepower: ~650 hp (restricted on superspeedways)

Fuel System: Spec Sunoco E15 fuel

Transmission: 4-speed manual, H-pattern

Rear-End: Solid rear axle with spool, steel driveshaft

----Suspension and Handling----

Front: Double A-arm with coil springs, adjustable shocks

Rear: Truck arm suspension with coil springs

Brakes: Ventilated disc brakes (steel rotors)

Steering: Recirculating ball steering box

---------Aerodynamics and Tires----------

Aero Package: