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 966166 upswept measures 12-1/2” x 1-1/4”

upswept measures 12-1/2” x 1-1/4”

without warning

Consists of an extra wide filter element plus a set of required offset spacers to transform your standard 900311 air cleaner assembly to extra wide version

Fits: > 75-06 B

For 96-103 inch stock engines

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 966166 upswept measures 12-1/2” x 1-1/4”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.