The 2004 Siemens 300 was the 19th stock car race of the 2004 NASCAR Nextel Cup Series season and the 12th iteration of the event.

[2] Ryan Newman of Penske-Jasper Racing would set the fastest time in the session, with a lap of 28.678 and an average speed of 132.813 miles per hour (213.742 km/h).

[2] Greg Biffle of Roush Racing would set the fastest time in the session, with a lap of 29.209 and an average speed of 130.398 miles per hour (209.855 km/h).

[5] The third and final practice session, sometimes referred to as Happy Hour, would occur on Saturday, July 24, at 11:10 AM EST and would last for 45 minutes.

[2] Ryan Newman of Penske-Jasper Racing would set the fastest time in the session, with a lap of 29.249 and an average speed of 130.220 miles per hour (209.569 km/h).

[7] Ryan Newman of Penske-Jasper Racing would win the pole, setting a time of 28.776 and an average speed of 132.360 miles per hour (213.013 km/h).