If you're concerned about redline RPM and the possibility of over-reving the engine, the FAST E6 Ignition Control is also available with an adjustable rev limiter. Not only is our rev limiting technology extremely accurate, it is the smoothest limit available thanks to our advanced sequential limiting technology. The RPM limit is easily set with two rotary dials on the side of the ignition and can be adjusted within 100 RPM increments all the way through 9,900 RPM. This E6 is supplied with Weatherpak connector and harness to help route the wiring, as well as sturdy vibration mounts. It can be used on distributor triggered, 4, 6 and 8-cylinder engines and is compatible with FAST EFI systems or carbureted applications.