Threaded outer and inner adapters reduce O2 sensor port from 18mm to 12mm allowing riders to use exhaust pipes on select newer-model motorcycles

The oval tabs are designed to be welded to the side wall of a rear motorcycle fender

7/16-14 x 3/8-24 studs are exact duplicate of OEM# 11733

a more efficient approach to rectifying regulators

Designed to fit 1" handlebars with an internal diameter of 21

#3694-4 Rear Fender Support Spacers 1972-1986 Harley-Davidson FX - Zinc Plated Bar Width_28-32 inches Threaded outer and inner adaptersZinc plated duplicate of OEM# 59938 72 spacers used on 1972 1986 Harley Davidson FX rear fender support. 4 pack. Made in Ohio, USA.