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New 1967 Pontiac Firebird hood tach. This hood tach has correct illumination and wire harness. Injection molded with clear lens. Most accurate on the market. 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.
Please note this hood tach is only compatible with 8 cylinder cars. They will not work on 4 or 6 cylinder cars.