MSD 31239 8.5mm Universal Spark Plug Wires Set, 90 Degree Boot
MSD 31239 8.5mm Universal Spark Plug Wires Set, 90 Degree Boot
MSD

|

#54731239

MSD 31239 8.5mm Universal Spark Plug Wires Set, 90 Degree Boot

  • Wires feature a well insulated, low resistance core
  • Sets test at 40-50 ohms per foot
  • Features HEI / Male cap and terminal style
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Wire Color / Plug Boot Type:

Red / 90 Degree

Black / Multi-AngleRed / Multi-Angle

$145.95

/set

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Product Summary

Spiral Core Conductor Style, 8.5" Diameter, Red, Gray

  • Wires feature a well insulated, low resistance core
  • Sets test at 40-50 ohms per foot
  • Features HEI / Male cap and terminal style
  • Coil wire measures a total of 31"
  • Both HEI and socket style distributor ends are supplied with the kit
See more details

Key Specs

MFG. Part #31239
Conductor StyleSpiral Core
Diameter8.5"
Cap Terminal StyleHEI / Male
Cap TypeHEI / Male
See more specs

Need To Know

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MSD 31239 Details

Routing spark plug wires is an art form. It takes patience and time to route your wires away from the headers, through separators and to the distributor cap. Some wire sets fit perfect, but a lot of people want to build their own so they can route them exactly how they see fit. Our Universal spark plug wire sets come with the spark plug terminal and boot installed with the other end open. Distributor cap boots and terminals are included so you can cut the wire to the desired length, then install the terminal with the supplied Mini-Stripper-Crimper. It's a little more work, but in the end it will be worth it.

Features:

  • Includes both socket-style and spark plug-style boots and terminals
  • Extra long 8.5mm wire so you can cut to your desired length
  • Includes Mini-Stripper-Crimper
  • Wire Lengths: 2- 56", 2- 50", 2- 42", 2-32" and Coil Wire 32"

These plug wires do require assembly although the plug end is alread installed.  Both HEI and socket style distributor ends are supplied.

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

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MSD 31239 Specifications

KEY SPECS
MFG. Part #31239
BrandMSD
Conductor StyleSpiral Core
Diameter8.5"
Cap Terminal StyleHEI / Male
Cap TypeHEI / Male
GENERAL
AssembledNo
Spark Plug Wire ColorRed
Spark Plug Boot EndsEight 90 degree
Spark Plug Boot MaterialSilicone
Spark Plug Boot ColorGray
RFI SuppressionYes
Distributor Terminal EndsMale/HEI and Female/Socket
Distributor Boot MaterialSilicone
Distributor Boot ColorGray
Coil Wire IncludedYes
Wire Routing TypeUniversal
Spark Plug Wire Resistance50 ohms/ft.
GTIN Code085132312399
Sold in QuantitySet

Ratings & Reviews

4.9

9 Reviews

Overall Assessment

Customers highly recommend the product, particularly for its quality and practicality. The MSD plug wire set from Speedway Motors has confirmed qualities like flexibility, which aids in fitting any engine and maneuvering around corners and headers. It's appreciated for its solution to burning plug boots, enhancing engine performance. Users find its custom-length wire enhances the engine's visual appeal. It also comes with clear instructions and includes wire crimp and cutter, simplifying installation. While it requires effort to install, customers believe it's worthwhile for the improved appearance.

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4.9

9 reviews

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I would buy this product again if needed

5.0

a month ago

Shawn

Streamwood Illinois

Verified

I'm using this for a rebuild after a fire I also bought. HEI Distributor and 22 circuit wiring harness

Would Recommend

I would recommend

5.0

3 months ago

Eric Webb

Kansas

Verified

Haven't installed yet but look like the usual quality of MSD product. Comes with a little tool also.

Would Recommend

WOULD BUY AGAIN

4.0

5 months ago

ELROY

BLOCK ISLAND

Verified

LIKED EVERYTHING

Would Recommend

I recommend speedway motors for all your auto needs !

5.0

3 years ago

Dave M

Middle River , MD

Verified

Thanks again Speedway motors ! I was in desperate need of MSD plug wire set the 90 degree boots called you and your staff hooked me up and got parts out right away, love doing business with you ! Dave M

Fixed my burned boots and missing

5.0

6 years ago

Tiny

Southern Utah

Verified

My 440 has shorty headers. They burned plug boots like crazy. This set fixed all that. No more missing.

This add character of full custom.

5.0

8 years ago

Bill's 56

Albany Oregon

Verified

Great look really dressed up my engine.

Would Recommend

Customer review image

Perfect fi and look

5.0

9 years ago

EJ

Shoreline WA

Verified

Thanks

Would Recommend

Great quality wire set

5.0

9 years ago

Dave

Oklahoma City

Verified

This wire set gives you plenty of wire to fit any engine. Very flexible to get around corners and headers. Good clear instructions and comes with wire crimp and cutter. Would buy again.

Would Recommend

Wires look great cut to exact length

5.0

9 years ago

Chuck

Sioux Falls, SD

Verified

Product is cut to fit with a need to install the distibutor end of the wires. A little more work because of the need to install the ends, but worth the effort because of the trim, neat appearance of the wires when they all exactly the correct length.

Showing 9 of 9 reviews

Questions & Answers

1 Question • 1 Answer

Can someone tell me what the length of the wires are in this kit and does the kit include the wire stripper/crimper? Thanks

by Don M.

• 14 years ago

1 answer

View Answer

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