We are offering a modified MSD Window switch for $49.99 with the purchase of any regular priced NOS or Nitrous Express system. This will save you $80. off the regular price. This RPM Activated Switch enables you to activate and then deactivate a circuit at adjustable rpm points. This is a great feature for engines using nitrous systems so the nitrous can be turned off just before the high rev limit of the engine. The Switch will provide a ground to activate a circuit and can handle up to 1.5 amps. The rpm levels are easy to adjust with the same plug-in modules used with other MSD rpm controls. It can be used on stock inductive ignitions as well as high performance capacitive discharge controls. You used to have to send the regular switch into MSD to be modified for use with the LS1 motor. We have taken care of this step so the switch will be ready for installation when you receive it.

If you are ordering a system for an LT1 we will included the window switch at no charge (it doesn't have to be modified). Orders can be placed online or by calling 1-877-4-TBYRNE.

Tom