suprisingly, it makes the bird sound like a V8...i had a few people tell me lastnight that it was a v8 actually...i chuckled...i mean seriously, when i go out anymore, i wish these people were telling me the truth. like i have a cam now?!?!? and i have ported heads?!?!?! its a 396?!?!!? they saw me carry the front wheel at sunshine!???!!!? i swear.