auto mechanics puzzle me because I always seem to know more than they do about my car? I'm like aren't you certified? I still don't know what certified is to them. I know cars change every 2 to 4 years, but I think auto mechanics should be educated more. I went to go look at a ms6 a couple weeks ago and I asked them about the mods that mazda made for the car(mazdaspeed dealer too), and the guy looked puzzled, and I asked the guy about the ms cai for the ms3, and he kept telling me it only produces sound and doesn't really add horsepower, but the ms cat back would. I'm like ok?