hi
MSD also makes a rev limiter

4 wire hook up

it is the only msd product i use.

mopar electronic fires my hemi instantly .

also have set up an ran points and some have not been toucthed in 7 years ad still gettig same et at the track .

only reason to use msd is to cover up a poor low speed air fuel mixture .

msd is back to snigle spark by 3000 rpm .