Each kit is within a 1,000 rpm range. For example, the PN 8745 is supplied with: 5,000, 5,200, 5,400, 5,600, 5,800 modules.
MSD 87471 7000 Series Module Kit, Odd Increments
MSD 8747 7000 Series Module Kit, Even Increments
MSD 8747 RPM Module Kit, 7000 Series @ Speed Tech
MSD Performance 8747 Module Kit 7000 Series Even Increments
