Ok so i had my car in the shop for abtou 3 months and just got it back. I have had a AEM CAI on it for about 3 years or so. And to my recollection i think i may have cleaned it once. ( yeah yeah i know). Anyhow although i had my engine replaced im pretty sure this is not part of my problem. When i accelerate once i get past 4k RPM it gets REALLY loud. The more i push on the accelerator the louder it gets. It totally sounds like its coming fromt he intake. Seeing how old my filter is and the lack of it being cleaned , is this the problem? What is the replacement filter size? Im not too sure what size to ask for if i go to pep boys or whatever? Any help?