1 Ohm Ballast Resistor
Product Discontinued
JEGSPART NUMBER: 555-40103

1 Ohm Ballast Resistor

Currently Unavailable

This product is no longer available. Please call customer service for assistance at 1-800-345-4545.

Ballast Resistor
Ballast Resistor
  • 1 Ohm
    Use with:
  • Stock OEM Coil or HP Coil 555-40105
  • Ignition Control Units 555-40800 & 555-40805
  • Mopar Orange 312-P4120505, Chrome 312-P4120534, and Gold 312-P4120600 Ignition Control Units

  • Recommended for most applications on street driven & high performance general purpose applications
  • Use with stock oem coil or jegs hp coil part number 555-40105, jegs ignition control unit part numbers 555-40800 & 555-40805, mopar orange ignition control unit part number 312-p4120505, chrome part number 312-p4120534, and gold part number 312-p4120600
  • Compatible with most mopar oem (oil filled) or oem-spec coils
  • Note: ballast resistors with less than 0.5 ohms are only recommended for racing applications that run high rpm & are not recommended for vehicles that idle for extended periods of time (i.e. 15-20 minutes) since this will overheat the ignition coil due to the longer dwell time at idle
  • Must have item when replacing or upgrading your ignition system components
    • 1.0 Ohm Ballast Resistor is recommended for most applications on street driven & high performance general purpose applications.
    • This ballast resistor is recommended with most Mopar OEM (oil filled) or OEM-Spec coils.
    • This ballast resistor is also recommended for use with HP Coil 555-40105.

      Note: Ballast Resistors with less than 0.5 Ohm are only recommended for racing applications that run high RPM only & are not recommended for vehicles that idle for extended periods of time (i.e. 15-20 minutes) since this will overheat the ignition coil due to the longer dwell time at idle.

      JEGS offers two options for ignition control on Mopar engines. Choose from the HiRev 7500® control unit with an OEM Appearance & modern electronics inside or the standard Orange control unit. The electrical connector on control unit plugs into all Mopar OEM and Mopar Performance wiring harnesses (both 4 & 5-pin harnesses). A replacement wiring harness and ballast resistor are also available to repair or upgrade the ignition system (sold separately).

      JEGS EZ Kits are designed by JEGS professionals to ensure that you get all the correct parts you need.

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      When you want reliable spark, smooth starts, and strong performance from your classic Chrysler, Dodge, or Plymouth build, the JEGS Mopar Electronic Ignition Control Units & Accessories deliver. Designed for folks who want to replace old points or tired OEM boxes, this line provides modern consistency with a vintage look and fit.

      These kits and control units offer upgraded timing stability, less maintenance, and better ignition precision. Options such as the HiRev 7500 control unit give you higher rpm capability with OEM aesthetic, while the standard orange unit gives dependable performance for everyday driving. Wiring harnesses and ballast resistors are also available to complete or repair your system, ensuring that all components integrate cleanly.

      Each item is made to work with both four- and five-pin OEM and performance Mopar harnesses, so installation is straightforward. Whether you’re converting a small block or big block, these electronic ignition mopar solutions give you improved spark delivery, better throttle response, and more consistent idle.

      If you’re considering a complete setup, the conversion kits bundle the ignition control unit with ballast resistor and harness—everything you need in one package. Thinking long term, the best mopar ignition module can not only help with performance but also ease of tuning, diagnostics, and parts compatibility down the road.

      In short: if you want your Mopar to fire with confidence, cut out the hassles, and gain modern reliability without losing that classic authenticity, these units and accessories are built for you. Add to cart now and get sparked up.

    Part TypeBallast Resistor
    Product LineJEGS Mopar Electronic Ignition Control Units & Accessories
    BrandJEGS
    Package Height1.3
    Package Width2.8
    Package Length3.4
    Weight0.15 PG
    Part CategoryPerformance Parts
    Part FitmentUniversal
    Package Qty1
    Package TypeEA
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    Some parts are not legal for use in California or other states with similar laws / regulations
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