These units are available in either 6300 RPM or 8400 RPM fixed rev limiters, they are second hand however they have been factory tested and all work A-OK and have
Crane Cams Australia warranty.
Plenty available at a small cost compared to a new unit.

Please Not these units will only work with a magnetic pick up distributor (MSD) or Crank trigger and will only suit 8 cylinder Engines