Brad Keslowski vowed last July he was not going to take it anymore at Daytona International Speedway.
On Thursday, he proved true to his word, while nearly crashing the car of 21-year-old William Byron.
During a practice run, Byron looked to keep Keslowski from passing him and had to make a dramatic save to avoid wrecking his No. 24 Chevrolet.
"Just had a big run," Keselowski said later. "He put me in a position where I had to lift, and I keep telling these guys I'm not lifting. Just trying to send a message. I'm not lifting.
"I'm tired of getting wrecked at these (super speedway) tracks."
Keslowski's No. 2 Ford slammed the left rear of Byron's car, sending it onto the apron and then into the garage for repairs.
"It's practice," Byron said. "I don't think that was really necessary to turn us there. I was just kind of holding my lane, and he just used his run to drive into my left rear."
The source of Thursday's dust-up dates to last summer's Coke Zero Sugar 400 in Daytona.
Running in the lead, Byron switched lanes, moving low to block Keselowski, whose car spun out and smashed the wall.
"I need to wreck more people so they'll stop throwing bad blocks," Keselowski said at the time.
