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In-Store Pickup Location

MSD 8.5mm Super Conductor Spark Plug Wire Sets 31223

Spark Plug Wires, Super Conductor, Spiral Core, 8.5mm, Black, 90 Degree Boots, Universal, L8/V8, Set

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  • Order this item and get free delivery and handling on your entire order! Offer excludes truck freight and oversize fees. Valid on orders shipped in the contiguous United States.

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WARNING: Cancer and Reproductive Harm For more information, visit www.P65warnings.ca.gov.

Brand: MSD Ignition

Manufacturer's Part Number: 31223

Part Type: Spark Plug Wire Sets

Product Line: MSD 8.5mm Super Conductor Spark Plug Wire Sets

Summit Racing Part Number: MSD-31223

UPC: 085132312238

Assembled: No

Distributor Terminal Ends: Male/HEI

Distributor Boot Color: Gray

Distributor Boot Material: Silicone

Spark Plug Boot Ends: Eight 90 degree

Spark Plug Boot Color: Gray

Spark Plug Boot Material: Silicone

Wire Color: Black

Diameter (mm): 8.50mm

RFI Suppression: Yes

Coil Wire Included: Yes

Conductor Style: Spiral core

Spark Plug Wire Resistance: 50 ohms/ft.

Quantity: Sold as a set.

Notes: Includes vice mount wire crimping tool.

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

MSD 8.5mm Super Conductor spark plug wire sets feature a special helically wound core that has just 40-50 ohms of resistance per foot—but with an RFI suppression equal to a 1,500 ohm wire. In fact, each foot of finished wire includes 40 ft. of tightly wound copper for superior conductivity. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective Electro Magnetic Interference "choke." This choke, or suppression capability, keeps the EMI inside the wire where it cannot interfere with other electronics on your vehicle. A tough, 8.5mm synthetic/silicone jacket over an extra-heavy glass braid and dielectric insulator keeps the current guided to the plugs. Underneath the high-temperature boots, dual crimp stainless steel terminals feature snap-locks to ensure a secure fit. Each set comes with clip-on cylinder markers for easy identification. MSD's 8.5mm Super Conductor wire sets are available in custom or universal-fit applications.

Warranty

Questions & Answers Ask a Product Question
Q:

Would This Be Good For a 1970 455 Oldsmobile Big Block With an MSD &’ 600+HP ?

Asked by TYRELL on March 08, 2019

A:

Tyrell, typically Oldsmobile 455's use a straight spark plug wire boot on the engine side. This particular wire set has 90° plug boots. A universal set with straight boots on the plug end is part number 31183.

MSD Ignition MSD Ignition Answer - March 11, 2019

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Q:

what is the initial length of the wires as if when i was just opening the box? need the wires to be long and not to short

Asked by NICHOLAS on July 26, 2018

A:

The universal wire sets come with wires a foot longer than stock and you will have plenty of wire length to do your application.

DAVID F from TX answered on August 02, 2018

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Q:

fit the 305 camaro 91 engine with 565-300 holley distributor? thank you

Asked by LUCAS on May 27, 2019

A:

Lucas, the 31223 wire set will work great for your combination.

MSD Ignition MSD Ignition Answer - May 29, 2019

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Q:

What's the best fitment for my 67 elcamino with a 454 big block? Stock them come with 8mm spark plug wires...

Asked by ROGER on November 07, 2018

A:

Roger, the 31223 universal wire set will work great for your big block El Camino. If you are looking for a pre-built set the closest we will have is part number 31373.

MSD Ignition MSD Ignition Answer - November 08, 2018

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Most Helpful Reviews Review This Product

14 Customer Reviews for MSD Ignition 31223 - MSD 8.5mm Super Conductor Spark Plug Wire Sets

Average Customer Review

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MSD Only

Summit RacingSummit Racing Verified Purchase

MSD-31223
MSD wires coupled with a pro billet distributor is unbeatable.

1 of 1 found this review helpful.

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Reviewer: from CO

Date: December 02, 2014

Appearance
Ease of Installation
Price/Value
Quality

MSD 8.5mm

Summit RacingSummit Racing Verified Purchase

MSD-31223
Very good quality and appearance !!

1 of 1 found this review helpful.

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Reviewer: from Brazil

Date: November 24, 2014

Appearance
Ease of Installation
Price/Value
Quality

Super wire set

Summit RacingSummit Racing Verified Purchase

MSD-31223
I really like these wires. Well made, thick and the boots are the best of any I've used. Better than the MSD street fire, Accel and others. The custom fit is the way to go for me and I really appreciated the quality of the crimper supplied. This set has the coil wire also. The only thing I didn't really care for is they used the old HEI style distributor boots with the little nipple that snaps into the retainer ring. Only 500 miles so far but if they hold up they'll be the best bang for the buck I've tried. ...read more

1 of 1 found this review helpful.

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Reviewer: from AL

Date: August 19, 2014

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Quality

Nice wires

Summit RacingSummit Racing Verified Purchase

MSD-31223
Id tags nice added. Description needs to state that it comes with the mini crimper. Crimper makes it very easy and secure.

1 of 1 found this review helpful.

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Reviewer: from CA

Date: July 07, 2014

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Quality

8.5 mm wire

Summit RacingSummit Racing Verified Purchase

MSD-31223
Custom built a set for my street rod and they are nice. Really like the SS “snap lock” terminal ends hearing the snap lets you know they are securely attached. On this set of wire I used a nice pair of ratcheting spark plug pliers. The pliers stripped, dual crimp dies, made the job of cutting and crimping the ends on so much easier than the supplied block and vise method that I have always done before. ...read more

0 of 0 found this review helpful.

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Reviewer: from FL

Date: May 29, 2019

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Price/Value
Quality

Some parts are not legal for use in California or other states with similar laws / regulations

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