Installed a Steeda SRI on my brothers 07zx4 on Sunday. No CELs after installation. Only thing i noticed was during idle (hood still up), I could hear a gulping/burping almost popping noise coming from the intake. I double checked the hose clamps and they were all nice and snug. He lives out in GR and haven't had a chance to ask him if he's heard it at idle. If someone else has heard this and it is a problem or not please let me know.