For long-term street durability with a high-perf cam, adjust lifters with Truarc-type retaining rings 1/4 to 1/2-turn down from zero lash; adjust paperclip retaining-ring lifters 1/2 to 3/4-turn ...

Internal rings have a bent-end to ease removal. Internal housing rings and external shaft rings are available in standard sizes from 0.375 to 3.0 in. diameters in carbon steel and 302 stainless steel.