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Hey all kinda long time MSF user, not enough MSO user. Sold my speed a while back and have b5 s4's now. Have a silver sedan, was my 1st one. I got it with a built trans, fx400 clutch and pp, full bolt ons, and tuned on pump gas. Bought a b5 s4 avant that needed a serious amount of work last...

NOTE: I have transferred this thread which was created by me on another forum in hopes of helping someone else! Hello fellow MSO'ers, So I've been having a hard time with this weird hum noise under boosted acceleration on my '07 speed 3. I've got some mods done to it, but I have no idea what...