Pop Secret 500

Pepsi Max 400

Venue	Auto Club Speedway
Location	Fontana, California, United States
Corporate sponsor	Pepsi Max
First race	2004
Last race	2010
Distance	400 miles (640 km)
Laps	200
Previous names	Pop Secret 500 (2004) Sony HD 500 (2005–2006) Sharp AQUOS 500 (2007) Pepsi 500 (2008–2009) Pepsi Max 400 (2010)
Most wins (driver)	Jimmie Johnson (3)
Most wins (team)	Hendrick Motorsports (4)
Most wins (manufacturer)	Chevrolet (5)
Surface	Asphalt
Length	2.0 mi (3.2 km)
Turns	4

The Pepsi Max 400 was a NASCAR Sprint Cup Series held annually at the Auto Club Speedway in Fontana, California. It was the second of two Sprint Cup Series races held at the Auto Club Speedway (the other being the Auto Club 500) and in 2009 and 2010 it was run in October as part of the Chase for the Sprint Cup.

The event was first held in 2004, added as part of the 2004 NASCAR Realignment, and was partially featured in the film, Herbie: Fully Loaded. From its inception until 2008 the race was run on Labor Day weekend, which was previously the traditional date of the Southern 500 at Darlington, and in the Inland Empire in the 1970s, the former California 500 United States Auto Club Marlboro Championship Trail race. The 2005 race was famous for Kyle Busch becoming the youngest NASCAR Sprint Cup Series winner ever (then known as the Nextel Cup Series).

As part of the 2009 realignment in NASCAR Auto Club Speedway, Talladega Superspeedway, and Atlanta Motor Speedway agreed to switch dates, with the Atlanta race moving from its traditional fall date to Labor Day weekend and becoming known as the Labor Day Classic 500. The realignment returns the Labor Day weekend race to the southern United States and gives California its first late season race since the final running of the Winston Western 500 at Riverside International Raceway in 1987. The AMP Energy 500 at Talladega will move into the race date vacated by Atlanta, with the Pepsi 500 moving into Talladega's former October date.

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