MSD 87431 3000 Series Module Kit, Odd Increments

MSD Ignition RPM Module Kit 87431 for 3100-3900 RPM Range

MSD 8743 3000 Series Module Kit, Even Increments, Kits include five modules

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

MSD 87461 6000 Series Module Kit, Odd Increments, Kits include five modules

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MSD Ignition 87431 RPM Module Kit