PN 6425 or 64253 Only. When that switch is released, the low rpm limit is turned off and the car launches hard! For use with Digital 6AL PN 6425 or 64253 only.
MSD 8732 Digital 2-Step Rev Control, for Digital 6AL PN 6425 Only
MSD 8732 2-Step Rev Control for Digital 6AL, PN 6425 or 64253 only
MSD 8732
MSD 8732 Multi-Step RPM Selector 2-Step Digital Plastic Black Ea