Single Tower Coil, Isolated Ground

This Coil is specially designed with a higher turns ratio that is matched to the MSD’s CD output.

PART# 42921

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$98.72   Your Price
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Depending on your application, you'll have two, three or four of these coils. The result is a high voltage spark that is capable of full output through high racing rpm.


Emission Code3
Maximum voltage30 kv
Primary resistance0.2 ohms
Secondary resistanceLess than 2000 ohms
Turns ratio70:1
Part Number42921


This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.

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    *Free Shipping & Handling only offered to the contiguous US on orders over $100.

    Some parts are not legal for use in California or other states with similar regulations.