My S3 howls at 60 to 65 mph, anyone else?

[dave-o]

At 60 to 65 mph I get a whhhaaaaaooooooooowwwwww increasing in volume then decreasing. It sounds kinda cool, well except when your running at a constant speed within those numbers. Just wondering if this is normal. Its an 07. Thanks!

[Cburt]

Is it stock, or are you running TOR, or Arrow? With either of these it will have a nice yaowel at 60 or so.

[dave-o]

Yep, I have the arrow 3 into 1. I think it sounds cool on decel!

[PhilM]

Make sure your chain has plenty of slack.

[Cburt]

Phil, why would you say somthing about a chain on a exhaust thread?

[PhilM]

Maybe I assumed too much. Thought it was a new noise as exhaust was not mentioned in the original post.