Apparently I must have ripped the large tube when taking apart or reinstalling it on the throttle body the other day because it started getting a surging idle and when I looked it is ripped half way across and sucking air. Anybody know the part number for the large round rubber air duct that connects directly to the throttle body? The car is a 2004 G35X.

 

Check here:

https://www.infinitipartsonline.com/...dan-parts.html Look under Engine, Air Intake, Air Cleaner body. Make sure you set the filter to your correct year and model.

 

Here you go:
14912-cd700

 

Thank you!