RPM Module Kits include five modules in 200 rpm increments.; 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 87441 4000 Series Module Kit, Odd Increments
MSD 8744 4000 Series Module Kit, Even Increments
MSD Performance 87441 Module Kit 4000 Series Odd Increments
MSD 8744 RPM Module Kit, 4000 Series @ Speed Tech
MSD Performance 8744 Module Kit 4000 Series Even Increments
