I put back my stock airbox and oddly enough, it sounds louder than my AEM CAI did......does the resonator box make this much difference?? It really rumbles now from 3-4K rpm, but I can feel the loss of power without the AEM..
i dunno, just something i noticed.

 

this is normal right??

 

if you didnt put the resonator back in its gonna be loud

 

With the resonator removed it will sound a lot louder. From the butt dyno, I really didn't notice any loss of power converting back to stock from the AEM; any loss is minimal.