A racing car?
4 seconds sound clip from the One Cab's Family (Tex Avery, 1952) movie soundboard.
You can hear this line at 00:03:09 in the Blu-ray version of the movie.
Quote context
[...]
(engine sputtering and revving)
- Mary! Hey, Junior just said his first word. He said, Br-rooom.
- Junior, you go to your room until you get them silly ideas outta your head.
- Them speed demons end up in a used car lot inside of two years.
- Son, you oughta be ashamed of yourself.
- Fox tail. Two end pipes. Hopped up motor. Dual carburetors. Oversized valves.
[...]