I just installed mine and i was adjusting the Valve lash and i noticed two of the rocker screws were at different lengths so I pulled everything apart and noticed the plungers were collapsed. These were brand new that i bought in 2018 and have been sitting in the unopened box until i was ready to build my Engine. I called COMP CAMS on the issue and the Tech rep said they do not warranty the lister after a year with no exceptions and I explain they were brand new and only the valve lash was being performed ( No luck).

I also asked if they could rebuild them and again no luck and then asked for the parts for me to rebuild them and the COMP rep said they do not offer them and i would have to buy a new set of Lifters, So my stance is i will never purchase another product from COMP CAMS as they will not correct this issue and they passed the problem to the buyer. $600 in the hole.

I am very disappointed with this company as I have used them for years with no issues, Not anymore.