Kyle Busch's death certificate reveals new details about the sudden passing of the NASCAR icon.

Busch, a two-time NASCAR Cup Series champion considered one of the best drivers of all time, died Thursday at the age of 41.

Kyle Busch, 41, died on May 21 after being rushed to the hospital when he was found unresponsive inside a race simulator near Charlotte, North Carolina.

Kyle Busch’s pneumonia worsened into sepsis, causing severe complications and hemorrhagic shock after a medical emergency before his death.

The document listed pneumonia and sepsis among a “chain of events” that caused the famed NASCAR driver's death last week.

Kyle Busch's death certificate reveals new details about the sudden passing of the NASCAR icon.

Kyle Busch died from hemorrhagic shock and disseminated intravascular coagulation after complications from bacterial pneumonia led to sepsis, his death certificate says

Kyle Busch died suddenly on May 21. What we know about his death at just 41 years old.