Each kit is within a 1,000 RPM range. For example, the PN 8743 is supplied with: 3,000, 3,200, 3,400, 3,600, 3,800 modules.
MSD 87461 6000 Series Module Kit, Odd Increments
MSD 8746 6000 Series Module Kit, Even Increments
MSD 8746 6000 Series Module Kit/Incl 5 Modules In 200 RPM Even Increments