Date Coded Chrysler Ignition Coils

Built Like The Originals. Engineered Beyond Them.

The Ignition Coil for Purists Who Demand the Best

These high-quality, Mopar-licensed coils are faithful reproductions of the factory installed ignition coils found on 1966 through 1971 Chrysler vehicles. Each coil combines an authentic OEM appearance with upgraded internal construction for superior durability, heat dissipation, insulation integrity, and high-voltage reliability.

Please READ THIS before ordering Date Coded Coils

Our Date Coded Chrysler Coils are correct for many 1966 to 1971 Chrysler cars. It is important to note that there were originally two distinct types of coils utilized in these vehicles, each manufactured by a different company. The coil we have reproduced is known by restorers as the “Long Skinny Type” and was manufactured by Essex. The Essex coil features the part number 2444241 and the words Made in USA stamped on the side of it. The Essex coil was used in a good majority of vehicles produced from 1966 to 1971. The other coil that was used was known as the “Short Fat Type” and was manufactured by Prestolite. The Prestolite coil has part number 2444242 on the side of it and the words Made in USA on top of the tower and is not currently being reproduced.

MOPAR®, JEEP®, DODGE®, HEMI®, PLYMOUTH®, RAM®, SRT®, CHRYSLER® and related logos, vehicle model names and trade dress are trademarks of Fiat Chrysler Automobiles used under license. © 2026 Fiat Chrysler Automobiles

Correct Tower Design

The tower is shaped just like the original, and features a fluted style crimp as original.

Date Coded

Coils feature a three digit date code stamped in green. Over 100 date codes are available.

Correct Part Number

Coils are stamped with the correct part number, in the same type style as the original.

Authentic OEM Appearance

A genuine alkyd tower, drawn brass high-voltage terminal, and machined brass primary terminals combine correct factory looks with excellent conductivity and corrosion resistance.

Advanced Internal Engineering

A seven-section bobbin secondary winding, a design rarely found in traditional canister-style coils, helps preserve insulation integrity for improved long-term reliability.

Check Out These Outstanding Features

Correct Three Digit Date Code
Coils are date stamped with the three digit date code as original, helping preserve an authentic, build-date-correct appearance.
Over 100 Date Codes Available
Choose from more than 100 date code stamps to find the closest possible match to your vehicle's original build date.
Correct Part Number Stamped In Green
Part numbers are stamped in green ink using the same type style as the original factory coil.
Correct Canister And Tower Design
Features the correct shaped canister and tower design with a fluted style crimp, just like the original.
Advanced Seven-Section Bobbin Secondary Winding
Divides the secondary winding into seven individually insulated sections to reduce electrical stress and help dissipate heat.
Brass High-Voltage And Primary Terminals
Machined brass terminals provide excellent conductivity and corrosion resistance compared to the aluminum and steel terminals used on many lower-cost replacement coils.

The Difference Is Inside

Restoration Plus Series Chrysler Ignition Coil Internal Construction

A Closer Look

Every component was chosen for what it contributes, not what it costs. Together, they create an ignition coil built for exceptional reliability, authentic appearance, and the higher standard of craftsmanship expected from a premium ignition coil.

Consistency Matters

The primary winding creates the magnetic field that produces spark energy. Precision CNC winding provides consistent turn spacing and uniform tension, preventing crossed turns and localized stress points that can compromise insulation over time. Lower-quality coils may rely on hand winding, resulting in jumbled or wild-winding construction with crossed turns, uneven tension, and less consistent quality.

Advanced Seven-Section Bobbin Secondary

This is the feature that keeps this coil from being just another replacement part. Instead of stacking the secondary winding in continuous layers, the seven-section bobbin separates it into insulated sections that reduce electrical stress and help dissipate heat to preserve insulation integrity. While common in modern ignition systems, this design is rarely used in traditional replacement coils. It adds complexity and cost, but delivers a level of reliability ordinary layer-wound coils cannot match.

Lower parasitic capacitance
Lower insulation stress
Reduced corona discharge
Improved resistance to internal arcing
Enhanced high-voltage reliability
Longer service life

Seven-Section Bobbin vs. Traditional Layer-Wound Secondary

See how the advanced seven-section bobbin secondary compares to the layer-wound secondary used in most traditional canister-style coils.

Aspect	Seven-Section Bobbin Secondary	Traditional Layer-Wound Secondary
Insulation Strength	Very high - Physical partitions limit voltage stress and reduce insulation breakdown risk	Lower - High voltage stress exists between winding layers
Voltage Capability	Handles very high secondary voltages (30 to 40 kV+) with greater reliability	More limited by insulation thickness and winding spacing
Parasitic Capacitance	Lower - Promotes faster voltage rise and a sharper spark	Higher - Can slow voltage rise and reduce spark efficiency
Voltage Distribution	More uniform voltage gradient throughout the winding	Greater voltage concentration between layers
Corona Discharge Resistance	Reduced electric field concentration minimizes corona discharge	More susceptible to corona-related insulation degradation
Thermal Performance	Better heat distribution with fewer internal hot spots	Inner winding layers retain more heat
Durability / Service Life	Longer life due to lower electrical and thermal stress	Shorter life due to insulation fatigue and thermal cycling
Resistance To Vibration	More resistant to vibration-induced insulation failures	Greater risk of layer-to-layer insulation wear over time
Manufacturing Consistency	Highly repeatable winding process with excellent quality control	More sensitive to winding tension and alignment variations
High-Voltage Reliability	Excellent resistance to internal arcing and dielectric breakdown	Higher risk of internal arcing under extreme operating conditions
Manufacturing Cost	Higher - Advanced bobbin design and additional manufacturing steps	Lower - Simpler construction and lower production costs

Silicon Transformer Steel Core Laminations

Efficient Energy Transfer

Premium high-permeability silicon transformer steel laminations help concentrate magnetic flux while reducing losses within the core. The result is more ignition energy delivered where it matters, at the spark plug.

Improving Magnetic Efficiency

Often eliminated in lower-cost coils, the internal steel sleeves help complete the magnetic circuit by providing a return path for magnetic flux. This improves magnetic coupling and directs more energy through the core assembly while reducing stray fields that can contribute to EMI and RFI interference. It is a component a customer may never know is missing, but one that helps separate a premium ignition coil from an ordinary replacement.

Authentic Appearance. Premium Materials.

A genuine alkyd tower, drawn brass high-voltage terminal, and machined brass primary terminals combine authentic OEM appearance with excellent electrical conductivity and corrosion resistance. Many replacement coils achieve lower prices by substituting aluminum high-voltage terminals, steel primary terminals, and generic plastic tower materials. The result is a coil that looks correct for the car show while delivering modern levels of reliability for everyday use.

Details Matter

Its heavy-gauge steel housing and oil-filled construction work together to draw heat away from the windings more effectively than epoxy-filled designs. The oil also provides a self-healing insulating medium while avoiding the thermal-cycling stresses associated with rigid epoxy encapsulation. Together, these features provide an authentic appearance with upgraded internal construction for dependable, long-term performance.

Specifications

Specification	Value
Primary Resistance	1.25-1.35 ohms @ 25°C
Primary Inductance	7.5-8.5 mH @ 25°C
Secondary Resistance	7.0-8.0 k ohms @ 25°C
Secondary Inductance	50-60 H @ 25°C
Maximum Spark Duration	3.1 mS
Peak Spark Gap Current	48 mA
Turns Ratio	80:1
Available Voltage	36 kV under load*

* Society of Automotive Engineers, Ignition System Measurements Procedure, SAE Recommended Practice J973a (Warrendale, PA: SAE, 1973).

Selecting the Correct Date Code

The date code stamped on the coil is easy to decode once you know the format. The first two digits indicate the week of manufacture, and the last digit indicates the year.

Week

7th week of the year

Year

1968

If You Have Your Original Coil

Check the coil for a visible date code and choose the matching date, or the closest one available, from our list of date codes.

If You Don't Have Your Original Coil

Subtract 1 to 4 weeks from your vehicle's build date to estimate the coil's date code. See the worked example below.

Example: Estimating A Date Code From Build Date

Year Of Vehicle	1968
Build Date Of Vehicle	March 1968 (approximately the 10th week of the year)
Estimated Date Code	078

A vehicle built in March would have been produced sometime between the 9th and 12th week of the year. Assuming it was built during the 10th week, the coil installed at the factory would have been manufactured 1 to 4 weeks earlier, in this case, date code 078.

Keep In Mind: There is no way to know the exact date code used in a given vehicle unless you have the original coil to reference. Without it, the best approach is to order a coil date coded 1 to 4 weeks prior to the vehicle's build date, with some exceptions, noted below.

Exceptions: Some special production vehicles, including limited production models and HEMI equipped vehicles, may have used a date code stamped more than 4 weeks prior to the vehicle's production date. If you believe your vehicle falls into this category and the correct date code is important to your restoration, call Frank Badalson at Auto Restoration Parts, (804) 275-2155. For a small fee, Frank can research your vehicle's details and determine the date code needed for a correct restoration.

Frequently Asked Questions

Determining the build date of some Chryslers can be a very complicated process and one that we don’t have room here to cover. Please call Frank Badalson at Auto Restoration Parts (804) 275-2155 if you need to find out a vehicles build date. For a small fee Frank will get the details about the car, let you know a probable build date and determine the proper date coded coil you need. As an alternative, there are books published on build dates and VIN identification that you can order from Year One, Inc. at (800) 950-9503 or from their website www.yearone.com.

Yes, but only when applicable. All coils prior to date code 018 have “CH412” stamped on them. You’ll find a note in our catalog descriptions indicating “CH412” on any coil that features the additional “CH412” lettering/stamping.

Vehicle production for a given year was normally August 1st. to July 31st.

Essex, Chrysler's original coil supplier, made coils every week of the production year, resulting in 52 possible date code combinations per year. We have chosen to consolidate the date code stamps to every three weeks in order to keep this project economically viable, and these are named Standard Date Code coils.

Standard Date Code coils are priced at $99.00, and if not in stock, one can typically be stamped and shipped within 1 to 2 weeks.

To broaden coverage beyond the standard three-week intervals, we also offer Non-Standard Date Code coils.

Non-Standard Date Code coils are priced at $139.00. These require a 6 to 8 week lead time, and are non-returnable.

Use the Search for Date Coded Chrysler Coils button below to see every Standard and Non-Standard date code currently available, or view our complete Chrysler Coil Catalog (PDF).

Yes. Our Restoration Plus Series Chrysler Ignition Coil is a clean, non-printed version with no date code, making it a great option when a plain, service-style replacement is preferred.