Customer Appreciation Week 2026

Pertronix Flame-Thrower Chrome Coil & Flathead Spark Plug Wires

Customer Appreciation Week 2026

Pertronix Flame-Thrower Chrome Coil & Flathead Spark Plug Wires
Speedway Motors

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#9100491

Pertronix Flame-Thrower Chrome Coil & Flathead Spark Plug Wires

  • Features a smooth chrome finish
  • For use with 12 volt inductive ignition systems
  • Puts out 40,000 volts and has a 1.5 Ohm primary resistance
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$96.99

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$107.99

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Product Summary

6.00" Overall Height, 2.25" Outside Diameter, Steel

  • Features a smooth chrome finish
  • For use with 12 volt inductive ignition systems
  • Puts out 40,000 volts and has a 1.5 Ohm primary resistance
  • Wires have a 7mm suppressive core that will go through your looms perfectly
  • Designed to fit 1942-53 stock Ford flathead V8's distributors, and all years of aftermarket distributors, Does NOT fit 1932-41 stock distributors.

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Key Specs

MFG. Part #9100491
BrandSpeedway Motors
Maximum Voltage40,000 volts
Material TypeSteel
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Speedway Motors 9100491 Details

Ignition Coil

The hotter the spark, the easier your engine will start, and this 40,000 volt coil is just the ticket to a quick start! Its higher voltage allows larger spark plug gaps for added power, smoother response and better fuel economy. These coils are internally resisted so they are compatible with many inductive ignition systems.  

  • Smooth chrome finish 
  • 40,000 volts
  • For use with 12 volt inductive ignition systems.
  • 1.5 Ohm primary resistance
  • Legal in all 50 states and Canada

 

Spark Plug Wires

Finally, a set of 7mm supression spark plug cables as a universal plug wire kit for your Flathead.

We started with black, 7mm suppressive core wire that will go through your looms. The 90° black plug boots are installed but you have to install the straight or 90° distributor ends. We even put in enough wire to place your coil on the firewall. Comes with straight boots for the distributor end of the plug wire. Black only.

Two sets of boots/terminals are included, one set for conventional socket-type caps and one set for HEI type caps. The set includes 9 cables, the longest being 51" and the shortest being 24". Use eight for the plugs, one for the coil.

Learn how to properly attach new spark plug terminals and boots by reading our tech article. How to Install Spark Plug Wire Ends.

Speedway Motors 9100491 Specifications

KEY SPECS
MFG. Part #9100491
BrandSpeedway Motors
Maximum Voltage40,000 volts
Material TypeSteel
GENERAL
Overall Height6.00"
Outside Diameter2.25"
Cap TypeSocket / Female
Cap Terminal StyleSocket / Female
Turns Ratio115:1
Voltage12 volts
Resistance1.5 ohms
Secondary Resistance10.60 ohms
Inductance6.40
Peak Current7.2
Spark Duration1.5
FinishChrome
Sold in QuantityKit

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Fitment

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

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  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

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  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

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