Eliminate tach signal noise and surges caused by your ignition system with this compact and easy-to-install tachometer filter. This filter installs between the tachometer and the signal source and modifies the signal for steady readings and faster response.
Can be used as a direct replacement for 1975-1989 GM vehicles. Measures 2"x 0.75"x 1".
Important: Recommended for vehicles running a tachometer designed for points-style ignitions for a crisp and cleaner signal.