ok, i am looking for this thing that acts just like the butterfly in the throttle body. except it's made to be connected onto the exhaust with a manual cable line for you to control how open or how much closed you want the butterfly to be. i believe it's an univeral part cuz the diameter they have are 60mm. but i remember reading in one of the car mags... but now i can't find the damn thing or even find it on line. can someone help me out???