No, man, I can't take you when I'm racing somebody.

5 seconds sound clip from the American Graffiti movie soundboard.

You can hear this line at 01:40:54 in the Blu-ray version of the movie.

Quote context

[...]

- Sticky little mothers, ain't they?

- They really...

- Six or seven of them, right?

- I know. I got a whole refrigerator full.

- Thanks a lot.

- See you later.

- Appreciate it.

- Rock on, baby. We gonna do it right here. Rock and roll yourself to death. Oh, mercy! Give me some more! My, my.

- Hey, John, let me go with you. Come on.

- No, man, I can't take you when I'm racing somebody.

- Oh, come on. Just let me go. I just want to watch. Or I'll flag you, okay?

- All right. Go ahead.

- Paradise Road.

- All right, now where's this Paradise Road?

- Just follow this street straight out of town.

[...]