BBK Cold Air Intake

[MGsTaNgGT22]

I bought this intake a while back but the car is making whistling sounds. It doesnt do it all the time. It seems like it does it more when I get on the car. Any thoughts?

I have a 89 Ford Mustang GT

 

[ID89GT]

Sounds like a vacuum leak. You may not be sealed up all the way at your clamps

 

[nero6]

A whistling sound is pretty common on a cold air intake when you get on the throttle. It is the sound of all the air rushing through your filter. You are sucking in alot more air than the stock set up along with the fact that you no longer have air silencer that was on the stock set up. As suggested, just check to make sure everything is sealed up properly and you should be good to go.