Part Description
Vented outer primary fits 1995-1998 Softail and Dyna. Also fit 1999-2006 Softail and 1999-2005 Dyna when installed with a 3-hole derby cover
Text excerpt from the catalog:
Vented primaries are for use with an up to 1 3/4" wide aftermarket primary belt drive. The vent slots provide an airflow to keep the belt running cool for improved belt life. Matching derby and inspection covers are available seperately.