MCS-902526 - Complete Dyna-S kit dual fire with single coil. The required mechanical advance unit must be purchased separately. Note: Difference between Single & Dual Fire: - Dual Fire - This is the way the earlier; pre-Twin Cam; engines work. A single coil is used

Fitment:
70-99 Big Twin models (excl. Twin Cam) and 71-03 XL Sportster (NU)