i just installed my single blade throttle body and jl ram air kit. i have a problem when slightly appling gas, it makes a hissing or whistling sound. it sounds like its coming from the air filter. i checked all vacumn lines and they are okay. anybody have this problem or is it normal.

 

A little whistle is normal on initial tip in of the throttle

 

thanks Don for the info, I was just getting a little worried.
shawn

 

had the same prob in my mustang when I installed a k&n filter. It sounded like the car was whining or whistling up till like 2500 rpms. I thought it was because the filter was not on snug enough but ignored it, don't worry about it!

 

To me it was a good sound........I like the whistle.

 

the sound is a little annoying, but well worth it with the new s/c whinne.