OER IN3361C Features:

Replacement dash tachometer with 6500 RPM red line 1970 Chevrolet Chevelle, Monte Carlo, and El Camino S.S. models. This dash tach has the 3 screw design just like the original! Sold individually. Tachometers will work with factory GM points or factory HEI ignition. When using an aftermarket ignition system likes MSD, Accel, Patronix, ect. A lot of these systems generates higher output voltage to the tach lead than what a factory GM tach can handle. Factory GM tachs can operate on voltage ranging from 11.2 to 14.7 Most aftermarket ignition systems generate over 18 volts. You will need to buy from the manufacture of your ignition system an adapter to lower the voltage to the GM factory voltage. Additional Information Note Tachometer 3 screw design 6500 Red Line Tachometer 3 screw design 6500 Red Line