Drag Specialties Custom Regulator Mount For Harley Big Twin 1936-1999 Allows the regulator to be mounted down and back out of sight. Features Requires two 1/4-20 x 1/2 bolts for installing regulator mount and two 3/8-16 x 2-3/4 bolts for installing mount to the frame Mounts regulator down and out of sight Optional 10-24 holes on back of mount for ground wire May require removal of the oil filter for installation