I've got a lot. I'll just post them periodically.
Here's the most recent favorite (starts at 0:34):
My long time favorite:
sorry double post
The car chase scene in Bullitt.. American muscle at it's finest!
This is one of my favorites. :)
I've posted this here once before, but it's worth posting again...
No video or audio, but the best engine sound I know came from my '86 VFR750 with a Yoshimura race pipe (short can).
That thing could crack bus windshields going through the Lincoln tunnel. Loads of fun.