MSD IGNITION Wiring Diagrams and Tech Notes - Scribd That is why we have assembled the MSD Ignition Wiring Diagrams and Tech Notes Book. This book is a collection of component installation procedures, applications and technical information. MSD 6N Series Dual Race Ignition Installation. 53-55 As the wiring diagram shows the “Gray” wire connecting to the “Violet” wire on the two5/5(2) MSD Performance Products - Official Site - holley MSD was the first company to develop and offer the multiple sparking, capacitive discharge ignition for engines. The line of MSD 6-Series Ignitions are the most popular aftermarket ignitions in the world due to our race-proven performance on the track and our reliability on the street!