S&S, Evo high performance tappet assembly set 84-99 Evo B.T. 86-90 XL (NU) All S&S T-series (Evo type) engines

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 engines but will also fit stock 84-99 Evo Big Twin (excl. Twin Cam) and 86-90 XL models. These lifters are compatible with virtually any engine application. 84-99 Evo B.T. 86-90 XL (NU) All S&S T-series (Evo type) engines