Vote: Will Kyle Busch Wreck Harvick at the NASCAR Sprint Cup Race at Bristol?

Kyle Busch and Kevin Harvick are infamous as two of NASCAR's hothead drivers. They've already clashed this year, and this week they've been at it again verbally leading up to the Cup race on Saturday night.

Will the war of words between Kyle Busch and Kevin Harvick spill over onto the track in Saturday's Cup race at Bristol Motor Speedway?

Harvick and Busch had choice words for each other following the Truck Series race on Wednesday night. Here's some background on what sparked the current dispute between the two drivers.

Busch had several close calls early in the truck race with Elliott Sadler, who sometimes drives for Kevin Harvick Incorporated. Then, on Lap 99, Busch slipped up the track in front of Sadler, turning Busch into the outside wall.

Busch limped around the track in his wounded race car, and two laps later he intentionally spun out Sadler.

In his post-race interview, Busch was furious with Sadler and blamed the KHI team for the incident. "Just look at where his (Sadler) paycheck comes from," he told ESPN.

After the truck race at Bristol on Wednesday night, Harvick (who won the race) had these words to say on Busch's actions and words:

"That just shows how smart Kyle Busch is. Elliott wasn't even driving for us tonight. We can get as dirty as Kyle Busch wants. If he doesn't want to race like that, he can go somewhere else. He's just a big crybaby and you can't fix that."

Earlier this season, Busch and Harvick were both put on probation following a post-race incident at Darlington.

Following an on-track disagreement, the two drivers met on pit road. As Harvick climbed out of his car and started punching Busch through the window net on his car, Busch drove away and pushed Harvick's car into the wall as Harvick was trying to punch Busch through the window net.

Needless to say, it's no secret that there is no love lost between these rivals.

Will their history of altercations lead to sparks flying on the track Saturday night? Cast your vote!