Kyle Busch receives tributes at Indianapolis 500, Coca-Cola 600 - ESPN

Auto racing's biggest day became a Memorial Day weekend tribute to NASCAR racing great Kyle Busch from Indianapolis to Charlotte Motor Speedway.

Busch died Thursday at 41 after severe pneumonia progressed into sepsis, resulting in rapid and overwhelming complications, according to a statement released by his family, and his loss sent shockwaves through the motorsports world and beyond.

At the Coca-Cola 600 — a race Busch won in 2018 — NASCAR and Charlotte Motor Speedway honored the two-time Cup Series champion with a large, black No. 8 and his signature on the frontstretch grass and a photo on the videoboard.

The U.S. Army Golden Knights planned to carry Busch's flag during prerace festivities following a moment of silence. Each of the 39 cars in the field will carry Busch's decal. And the speedway's public address system and the television commentators plan to go silent on the eighth lap of the race.

There may be other undisclosed tributes planned as well, per track officials.

On Saturday night, Layne Riggs celebrated his Trucks Series win at CMS by doing one of Busch's traditional bows to the crowd after the race, and Ross Chastain did the same after capturing the rain-shortened O'Reilly Auto Parts race.

NASCAR CEO Steve O'Donnell called Busch «an American badass.»

«When you think race car driver and what that person should be like, Kyle Busch is probably one of the first that comes to your mind on the type of racer he was,» Cup Series driver Joey Logano said.

Fans at CMS arrived in droves with shirts to honor Busch that read «Rowdy» and «KFB.»

Earlier in the day at the Indianapolis 500, Dale Coyne Racing changed the font of Romain Grosjean's No. 18 car to replicate the font the two-time NASCAR Cup Series champion and