Any auto parts store, about 2.00.

 

It's just a standard 4 barrel carb air cleaner gasket.

 

advance auto part number 60038 (felpro)

 

Chances are that whistle noise is from the air moving through the pipe. My guess is it aluminum pipe? When I put the CAI on my car I get a slight whistle at idle but when I'm excellerating it sounds like a turbo spooling.

 

This is my '99 5.2 modified air cleaner.

 

^Yep. I got a spectre off ebay and its aluminum piping. When i start it up it whistles and sounds like a turbo spooling, but once i get it warmed up it's fine and don't really whistle anymore.

 

the whistling noise i had was the extra amount of air the cai was letting in, but i would check to make sure your gasket is in place, you can get a gasket just about anywhere, i got mine at autozone, just a 5in o ring throttle body gasket. Also check your hoses, turns out i had a crack in one of my hoses going to the throttle body

 

Yup that's exactly what my car does, louder when cold and quiets down as it warms up. Completely normal.

 

Mine does the same thing. It needs the gasket too!

 

I got the gasket nd it didnt help. Might try checkin the hoses to se if there are any cracks or somethin