I live in cali and need and air box to pass visual inspection, so i wanted to know what is the difference in the two because the dealership said it mostlikely won't work because two different part numbers and i can't seem to find an atw code air box. so if anyone has any advice to my problem or has the upper and lower for sale with the ducts let me know. thanks guys

 

ATW has the secondary air pump which connects to a port on the airbox. 99 doesn't have it. An 01/AWM airbox would work too.

 

good lookin thats what i was thinking