yeah they are noisy when they're out of adjustment. i aggravated a friend of mine because his were off a little and it sounded like an exhaust leak. other than that they are quiet.
hey 8950ho, can you enlighten me about what preload you used. I torqued them down to 22lbs but mine still make some noise. I was recommended to the a set of slightly bigger push rods but not sure on what to do.