Yes they are noisy , precious setting of the preload seems to work on the one I did earlier this year. If I had to do it over again I would have just used a solid .

I don't think it's noisy lifter , especially since they are under preload pressure always, it more the valves slamming closed ???

The one I did also didn't use Comp lifters , first time around yes and that one started to lose a lobe , or it was just really noisy with the comp lifters that it sounded like something real bad was happening , anyway a custom Grind from Dwayne porter , maybe it didn't have as aggressive a ramp as the XE , and a set of Crower Cam saver lifters along with the time I spent setting prelaod , it was hardly noticeable last time I had my head under the hood of the car it was installed in .