Colony, circuit post rebuild kit - 30-48 all H-D (NU) 597559 Also helps reducing water intake

Also helps reducing water intake in wet weather conditions

1-3/4" headpipe steps to 1-7/8" into the collector to increase flow and improve performance

Other components must be re-used

An interference double spring design with damper that keeps the inner and outer springs from locking and reduces harmonic vibrations

It is very comfortable to wear even on hot days due of the cotton twill outer and the coolmax inside

Colony, circuit post rebuild kit - 30-48 all H-D (NU) 597559 Also helps reducing water intakeReproduction of a kit offered by Harley in the 1940's. Used to repair damaged or broken posts and insulators. Includes installation tool.