Even and odd module kits exist so a rev limit can be dialed in between the standard hundred-rpm steps. This odd increment kit sits between the even 6000 series values, which is useful when a valvetrain or a gear ratio puts the useful shift point on an odd number.

MSD 87461 6000 Series RPM Module Kit Features:

• Five modules covering 6,100, 6,300, 6,500, 6,700 and 6,900 rpm.
• Even 200 rpm spacing between modules, offset from the even series kits.
• Plugs into ignition controls that accept rpm limiter modules.
• C.A.R.B. E.O. number D-40-29.