Generator & Cone Shovelhead Exhaust Valve Guide (OEM/NOS #18181-48)
Our earliest Factory references show this part number for FL, FLH, FX, and FXS models for 1966 to at least 1978. Curiously, our late Factory references indicate a different part number, but we're not sure why the Factory made the change. This is considered a standard ("std") guide for stock motors. Sold, individually. .