REV LIMITER

I use the Rev-N-Nator stock looking ICU, has a small button to limit revs in 1000 rpm increments. LED lights when running, so its easy to see where your limit is set.
Comes in Orange or Black. Great small shop customer service too. No complaints.
The Rev-n-nator, the revinater, the revonator and R/T Garage - Mopar Restoration and Performance Services in Belle Plaine, MN.