Horse Sense:NMRA racers should consider themselves lucky the sanction even permits the use of MSD's 7531 ignition box in some of the heads-up classes. In a classic, racing-rules catch-22 (where a kick ...
You might know it as MSD Ignition, a company most famous for its line of ignition boxes, and in fact MSD stands for multiple spark discharge. Most companies would kill to have the market share that ...
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