MSD - Three Step Module Selector optimized winding resistance and turns

optimized winding resistance and turns ratios to deliver 10-15% more energy than the OEM ignition coils

875 in ID - 10 in Length - 170 lb/in Spring Rate - Steel - Purple Powder Coat - Each

Slip Yoke - 27 Spline - 6

874 in OD - Ford FE-Series - Set of 16

MSD - Three Step Module Selector optimized winding resistance and turnsThe Module Selectors can also be used with an MSD Timing Control. By plugging the Selector into a retard module socket, you can activate different retard amounts at select times. This is a great feature for engines being upgraded to a multi stage nitrous system. With the addition of an RPM Activated Switch, you can use the Two Step to activate a shift light at different rpm. The Module Selectors must be used with an MSD Soft Touch Rev Control or a