Twin Power™ advance unit precisely replaces H-D 32517-70T, restoring accurate ignition timing for 1970-1979 Big Twins and 1971-1979 XL Sportsters during critical distributor service.

• Direct OEM replacement ensures smooth power delivery and prevents detonation issues
• Includes timer screw, advance cam and mounting hardware for complete installation
• Perfect for Shovelhead rebuilds and points-to-EVO ignition conversions