So when im driving around i hear this hissing sound and then a couple of secs later, you smell this coolant/antifreeze-ish smell through the vents. No smoke, etc. Nothing leaking in driveway and all pressures and guages are reading normal.

This only started happening after installing my CAI, IC, LICP, & UICP from AMS. Any ideas? Thanks.

I have the exact same installs on my X and have zero problems. As for the smell Im not really sure what that could be coming from but def do a boost leak test and make sure everything is secured properly.

cool thanks! Just out of curiosity, have you dynoed your car to see what its outputting?

New parts breaking in. It should go away, double check for leaks and such.