This Reverse Idler Spigot fits Hewland and Webster Mk-series and Formula Mazda gearboxes. It accepts a 5/16-24 Reverse Idler Retaining Bolt (Part No. 1410-C10-2) to hold the reverse idler gear in place. (Mk4-8 originally used a 1/4-28 bolt.) Replaces Hewland part number HC2373.
