Ignition controls that use plug-in rpm modules only limit at the value stamped on the module, so changing the rev limit means changing the module. Buying a kit instead of a single module gives you five limits inside a 1,000 rpm window, which is enough range to adapt to a gear change, a new converter or a different track without ordering another part.

MSD 8746 6000 Series RPM Module Kit Features:

• Five modules covering 6,000, 6,200, 6,400, 6,600 and 6,800 rpm.
• Even 200 rpm increments across the kit.
• Plugs into ignition controls that accept rpm limiter modules.
• C.A.R.B. E.O. number D-40-29.