At just over ten seconds, the clip gives the rev room to rise before the car rushes past. It can usually be used without trimming, though cutting the lead-in makes faster reactions. Download the MP3 to keep it available offline or import it as a ringtone or notification tone. When layering it over speech, lower the engine enough to preserve words and avoid clipping. For a more exaggerated speed sequence, follow it with a Cartoon Run Take Off or a Teleport Sound Effect.