Twin Power™ starter relay replaces H-D 31506-79B, delivering consistent solenoid activation for 1980-E93 Big Twins and XL models

• Plug-n-play replacement solves intermittent starting and relay failure on Shovelhead through early Evolution
• High current contacts handle Big Twin starter draw without arcing or dropout
• Universal fit covers 1980-1993 Big Twins and all XL Sportsters in that range