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 87481 8000 Series Module Kit, Odd Increments
MSD 8748 8000 Series Module Kit, Even Increments
MSD Performance 87481 Module Kit 8000 Series Odd Increments
