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SKU
42-74728-1
Alt #:
64-74728

Filter For Sprint, Cyclone, or Rotunda Tachometers

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$31.99 Each
Product Details
Installed between the Tachometer and the Ignition Trigger Source (usually the coil) this filter traps, redirects, and dissipates the high voltage spikes and surges that are emitted by any late-model high-energy ignition system. Also modifies the sharp up-and-down spikes into a semi-square wave signal for steady pointer readings and faster pointer response. Three color-coded wires allow fast and easy fool-proof connections for life-time protection and superior response on all Classic Tachometers.
Availability: In Stock - 3-5 Day Delivery
  • Must be used with HEI Ignitions
  • Cleans Up Signal
  • Easy To Install 

Installed between the Tachometer and the Ignition Trigger Source (usually the coil) this filter traps, redirects, and dissipates the high voltage spikes and surges that are emitted by any late-model high-energy ignition system. Also modifies the sharp up-and-down spikes into a semi-square wave signal for steady pointer readings and faster pointer response. Three color-coded wires allow fast and easy fool-proof connections for life-time protection and superior response on all Classic Tachometers.

Filter For Sprint, Cyclone, or Rotunda Tachometers


Combined Cancer/Birth Defect
WARNING This product can expose you to chemicals including Phthalates which is known to the State of California to cause cancer on birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov
More Information
Base Part Number 74728
Alt. # 64-74728
Eck OEM Number SN20
Brand Classic Instruments
Make / Model Series Body Notes Year
Make / Model Series Body Notes Year 2100
Make / Model Ford Fairlane Series Body Notes Year 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970
Make / Model Ford Fairlane 500 Series Body Notes Year 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969
Make / Model Ford Fairlane 500XL Series Body Notes Year 1966, 1967
Make / Model Ford Fairlane Base Series Body Notes Year 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969
Make / Model Ford Ranchero Series Body Notes Year 1967, 1968, 1969, 1970
Make / Model Ford Ranchero 500 Series Body Notes Year 1967, 1968, 1969
Make / Model Ford Ranchero 500 XL Series Body Notes Year 1967
Make / Model Ford Ranchero Base Series Body Notes Year 1967, 1968, 1969
Make / Model Ford Ranchero GT Series Body Notes Year 1968
Make / Model Ford Torino Series Body Notes Year 1968, 1969, 1970
Make / Model Ford Torino Base Series Body Notes Year 1968
Make / Model Ford Torino GT Series Body Notes Year 1968
Make / Model Mercury Montego Series Body Notes Year 1968, 1969, 1970
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