It's pretty damn obvious...
3 seconds sound clip from the Days of Thunder movie soundboard.
You can hear this line at 00:19:09 in the Blu-ray version of the movie.
Quote context
[...]
- We messed up big-time on Sunday.
- And what do we do? We end up looking like a monkey fucking a football out there.
- Everybody out, please. Except you two.
- I've got a question. What is the one thing you absolutely need to do to win a race?
- You need to finish the race.
- I realize Harry's been around a long time.
- Well, if he wouldn't get excited and over rev the son of a bitch, the engine wouldn't blow.
[...]