The H-4 Dual harness is needed if your bike has an H4 connector on the headlight
This harness will work with both single and dual headlight/ motorcycles and with most Harley Davidson Motorcycles or motorcycles that use a Dual Filament Bulb
The H-4 Dual harness is needed if your bike has an H4 connector on the headlight This harness will work with both single and dual headlight/ motorcycles and with most Harley Davidson Motorcycles or motorcycles that use a Dual Filament Bulb