Help identify piece

If you end up replacing it look into the NAPA #29325 - which I found out from some old post @slantsixdan replied to where he listed PCV part numbers. I was buying the PCVs Autozone recommended for my /6s and they just never seemed "right". They were unusually loud when the engine was running... in way where I could hear them when I was driving. I took a ride to the local NAPA and switched it out to the one Dan mentioned and it made a world of difference... idle smoothed out, no crazy a$$ vacuum rattle from under the hood. The NAPA one just seems to be made "better" I guess.