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Factory Ballast Resistor, 70-73 240Z

Factory Ballast Resistor, 70-73 240Z
You can choose a Z-Car from your garage, or from the selections above, to filter the store or check part fitment.
Part #:12-4145
Price: $26.45
Available Again! Nissan discontinued these genuine, original equipment (OEM) resistors many years ago. We recently found a new supply of factory replacements. Get yours before they disappear!

  • (1) Ballast Resistor

The ballast resistor is designed to protect your distributor (the ignition points in particular). It sets the resistance in the ignition to 3.0 Ohms when combined with the resistance in the factory coil or 1.5 Ohm coils. In addition, it is needed to get an accurate tachometer reading when stock or 1.5 Ohm coils are used, as the tachometer takes its reading from after the ballast resistor.

Ignition Coil Note:
This ballast resistor should be used with stock ignition coils and 1.5 Ohm coils, such as our 1.5 Ohm PerTronix Flamethrower Coils. It should not be used with 3.0 Ohm PerTronix Flamethrower coils or Crane coils. For all others, check with the specific manufacturer for whether a resistor is required or not.

Model Guide:
Datsun 240Z

Code Guide:
Datsun S30

Year Guide:
1970, 1971, 1972, 1973

Some parts may not fit every version of every year listed. See product Title & Description for any application breakdowns or customization options, and contact us with any questions.

  • 1970 Datsun 240Z
  • 1971 Datsun 240Z
  • 1972 Datsun 240Z
  • 1973 Datsun 240Z
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