Sale

Ignitions and Electrical Ignition Components

MSD

Super Conductor Spark Plug Wire Set Chevy 454 75-On Hei For Use On Chevy 454 '75-On, Hei, Red Jacket MSD Ignition

$230.95 $179.95 Save $51.00

SKU: M00T 31779

In Stock
In Stock
Ships by Sep 16
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The MSD Super Conductor Spark Plug Wire Set is a specific-fit ignition component designed for Chevy 454 engines from 1975 onwards with HEI systems. These red 8.5mm wires feature a low resistance design with a helically wound copper alloy conductor. The wire's construction includes a ferro-magnetic impregnated center core to suppress electromagnetic interference and a durable outer sleeve made from a proprietary blend of silicone and synthetic material to resist heat and abrasion.
Show original supplier description

Part #: 31779

Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire; incredibly low resistance without electronic interference! In a single 12 inch length of Super Conductor Wire there is only 40 - 50 ohms of resistance! That is the lowest resistance of any helically wound wire. To accomplish this, we use a copper alloy conductor due to it's great voltage carrying capabilities. The low resistance results in less loss in spark energy so more reaches the spark plug. The conductor is wound extremely tight around a special center core. So tight in fact, that there is over 40 feet of conductor wrapped into a single foot of plug wire. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective Electro Magnetic Interference (EMI) "choke". This choke, or suppression capability, keeps the EMI inside the wire where it cannot interfere with other electronics on your vehicle. The outer sleeve that surrounds the conductor assembly is just as impressive. A proprietary blend of silicone and synthetic material produce a sleeve that is highly resistant to high heat as well as abrasion and tears. The MSD's 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps; one for the sleeve of the wire and another separate crimp to grasp the conductor. The MSD's 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps; one for the sleeve of the wire and another separate crimp to grasp the conductor.

Features:

  • Custom fit for make and model listed.
  • Wires are precut to exact specifications
  • Bolt-on performance

Spark Plug Wire Set - Super Conductor - Spiral Core - 8.5 mm - Red - Straight Plug Boots - HEI Style Terminal - Big Block Chevy - Kit

Vehicle Symptoms
  • Rough idle on Chevy 454
  • Engine misfires under load
  • Poor acceleration and hesitation
  • Hard starting or no-start condition
  • Check engine light flashing at highway speeds
Diagnostic Codes
  • P0300 – Random or multiple cylinder misfire Det
  • P0301 – Cylinder 1 misfire Det
  • P0302 – Cylinder 2 misfire Det
  • P0303 – Cylinder 3 misfire Det
  • P0304 – Cylinder 4 misfire Det
  • P0305 – Cylinder 5 misfire Det
  • P0306 – Cylinder 6 misfire Det
  • P0307 – Cylinder 7 misfire Det
  • P0308 – Cylinder 8 misfire Det
Relevant Conversations
  • MSD Super Conductor vs Taylor 8mm spark plug wires for 454
  • HEI spark plug wire install instructions Chevy 454
  • P0300 on 1978 Chevy 454 – replace plug wires?
  • Best spark plug wires for MSD ignition system Chevy
  • Rough idle after tune-up on big block Chevy
  • MSD 31779 spark plug wire set review Chevy 454
  • Co-purchase: MSD cap and rotor with plug wires
  • Spark plug wire resistance too high symptoms
  • Can bad spark plug wires cause P0302?
  • MSD Super Conductor wire lifespan on street driven 454

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMSD
Part NumberM00T 31779

About MOTORMIA

5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy