MCS-515664 - With special rollers and hydraulics. S&S tested up to 7800 RPM; without pump-up. Inner bearing race has an increased outside diameter so more and larger needle bearings could be used. Tappets are hand-fitted and pressure tested. Used in all S&S Evo type e

Fitment:
84-99 Evo B.T.; 86-90 XL (NU); All S&S T-series (Evo type) engines