Black Spin-On Oil Filter for Harley-Davidson

With 5 micron filter media.

OEM replacement part number 63731-99A.

Note: This filter is no longer recommended for M8 models from 2020 onwards.

The factory introduced a new filter with a larger (elongated) body and 25% larger filter surface area to better handle the increased oil flow in the M8 models.

For MCS M8 oil filters, see 920966 chrome, 920967 black, 920968 chrome with top nut, and 920969 black with top nut.

Fits: Softail > 1999; Twin Cam 99-17; M8 17-20