Manufacturer's Part Number:
Summit Racing Part Number:
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These Classic Instruments tachometer filters install between the tachometer and the ignition trigger source. They are designed to trap, redirect, and dissipate the high-voltage spikes and surges that are emitted by any late model, high-energy ignition system. The filters also modifiy the sharp up and down spikes into a semi-square wave signal for steady pointer readings and faster pointer response.