Yep same here I added a stereo. Lolkas232ca wrote: Thu May 16, 2019 5:17 pmMine whistles. Gives my wife a headache. Told her Captians Call install would fix that...Big Block Power wrote: Wed May 15, 2019 8:06 pm Very cool. Did yours ever have the whistle? Or did you look to see if you had a iac muffler in place?
It does look fast under there.
I added the volvo/cobalt deflector and that solved the issue. Along with the iac filter. There is another fix. By centering the throttle body and grinding the gasket flush and some of the throttle body alignment to the Intake.

