These Risers accept a 1/2-13 bolt

replaces OEM# 23967-54A

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

screw and lockwasher used on 1950-1971 Harley-Davidson FL/FLH

Mounting studs are 5M-

Replacement 41MM Fork Springs 1984-1999 Harley-Davidson FXST OEM# 46048-84 Subcategory_Oil Tank Hardware These Risers accept a 1/2-13These high quality replacement fork springs will freshen that worn, tired front end up! High quality, high performance replacement fork springs Made to exact OEM specifications Replaces OEM# 46048 84 Sold in pairs