You probably won't get any noticeable performance gains because the cam will be over its performance curve. Put in a cam that makes power at a higher rpm without messing up your idle and low-speed driveability. Be careful, the wrong decision can turn it all into a nightmare.

Mine kick in at 5200 according to the tachs.

Don't ask how I know this.

Does anyone know how accurate MSD's rev limiters are? I assume that the accuracy is pretty fine?!