Intake tappet only. Solid lifter tappet to fit OEM Knuckleheads. Also stock replacement for S&S KN-series (Knucklehead style) engines. Repl. 18491-36. Note: See fmc-531-590 for a complete intake & exhaust tappet set. Note: Special Order Product only. To order please contact your FMC sales representative.
Fits: > 36-47 Knucklehead; All S&S KN-series (Knucklehead style) engines
