i've been using my toplines for a while, no issues, no tick. yes i know they're a little longer (52mm) but no issues. revised/larger oil passages as well. soaked fully in oil before installing. i heard gsc zero tick lifters can also go bad over time. i originally bought them, sold/returned for the toplines. very happy with the choice.

 

Thanks a lot, now I feel better to use them. I was not sure about topline because they are pretty cheap but what it look like they are better than gsc. I was reading some dsm forums and some people have been using topline's for years with no problems.