yeah i know its just the air manifold is open larger then stock, i know, i think i figured it out though i think i might have a bad tentioner or whatever , but yeah i check the valves and nothing is vibrating but the tentioner is moving its not supposed to so im going to get a new one and put it on hopefully thats it... then ill be ready to switch everyhting off my black 93 on to this one...fingers crossed....thanks for the comments also appreciate it...