MSD 87451 5000 Series Module Kit, Odd Increments

MSD Ignition 87451 RPM Module Kit

MSD 87451 5000 Series Module Kit, Odd Increments, Kits include five modules

MSD 8743 3000 Series Module Kit, Even Increments

MSD Ignition RPM Module Kit 7100-7900 RPM for Performance Vehicles

MSD Ignition 87451 | Odd Series RPM Module Kit 5100-5900 RPM

MSD Ignition RPM Module Kit 6100-6900 RPM for Performance Tuning