I've actually had the air adjuster for about a year now and its working great for me. Its frustrating at first because it takes a little while for the computer to adjust and it takes a while till you get the right tune. I've switched out the injectors to 24lb while using 19lb MAF and its worked fine for me. You can step up to 30lb injectors with a 19lb MAF. This little unit helped me pass emmisions also. I had the e-cam, LT headers, short h w/cats also, but I didnt have any smog junk hooked up.