Rev limit on a module-based ignition control is set by the plug-in module, so a single module locks you to one number. This kit supplies five of them across a 1,000 rpm window in the 7,000 rpm range, which suits a higher-winding small block or a combination that has moved past the limit it was originally set up for.

MSD 8747 7000 Series RPM Module Kit Features:

• Five modules covering 7,000, 7,200, 7,400, 7,600 and 7,800 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.