Here are links to a couple of sound clips of a iron headed drag race Y engine making in excess of 500 HP through the mufflers. Turn up your speakers and enjoy. You might want to pull your feet back away from the speakers though.
500+ Horsepower dyno pull 1
500+ Horsepower dyno pull 3
Thanks go to Jim for recording these on his I-Pod while visiting.
Lorena, Texas (South of Waco)