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 1967-1989 GM vehicles.{specs}Includes Instructions.Important: Recommended for vehicles running a tachometer designed for points-style ignitions for a crisp and cleaner signal.
