MSD 89561 DIS-RAS

Distributorless RPM Activated Window Switch.

MSD rpm-activated window switches allows you to take control of your nitrous.

You can activate and deactivate circuits at pre-programmed rpm "windows" and

they are especially useful for nitrous equipped engines, because the nitrous system

can be shut down just before the engine's high-rev limit.

They include a ground to activate a circuit, and can handle up to 1.5 amps.