MSD - Window RPM Activated Switch 625 in ID - 12

625 in ID - 12 in Length - 150 lb/in Spring Rate - Steel - Chrome - Each

Supports up to 550 EFI or 700 Carb HP (HP Rating @ 60 PSI at 13

Gauge Cup - 2-1/16 in Diameter Gauge - 1-5/8 in Roll Cage Mount - Plastic - Black - Universal - Each

5 in Tall Core - 2

Car Wiring Harness - Classic Update - Complete - GM A-Body 1968-69 - Kit

MSD - Window RPM Activated Switch 625 in ID - 12The RPM Activated Switch, PN 8950, has two activation wires; one to ground a circuit and the other to open a circuit. Simply plug in an rpm module and wire the Switch to the circuit you want to activate. When the engine rpm reaches that amount, the circuit is activated and will remain on until the rpm falls below that amount.