Track OrderOrder Status & ReturnsHelpGift CardsHelpHelp CenterPhone1-800-345-4545
Shop by Category

Most Popular

Restoration

Shop All Categories

Shop New ProductsShop ALL BrandsTech ArticlesDeals
MY ACCOUNT
Order Status & Returns
CONTACT USHELP CENTER
Logo
Cart0
$000
Red Universal 8.5mm Spark Plug Wire Set 8-Cylinder Kit
InfoVehicle Info Needed
MSD IGNITIONPART NUMBER: 121-31229K

Red Universal 8.5mm Spark Plug Wire Set 8-Cylinder Kit

Color:

Black
RED
Red
$22531
8 left in stock
ShippingShips on Sep 08, 2026
Lowest PriceLowest Price Guarantee
Best Value
Save
$15732
Made in USA
8.5mm Red Ultra Pow'r Wires Small & Big Block Chevy Over Valve Covers or Under Headers

555-4020066

8.5mm Red Ultra Pow'r Wires Small & Big Block Chevy Over Valve Covers or Under Headers

$6799

Red Universal Spark Plug Wire Sets
Red Universal 8.5mm Spark Plug Wire Kit
  • Includes:
    • MSD Red Universal 8.5mm Spark Plug Wire Set
    • Spark Plug Wire Crimping Tool
    • Black Boot Guards
    • Wire Separator Kit
    • Dielectric Grease

    • MSD's Universal Spark Plug Wire Sets are available in your choice of black or red wire for a variety of applications and include a spark plug terminal and installed boot with one open end. The set also includes distributor cap boots and terminals so the wire can cut to a specified length and installed with the supplied mini-stripper-crimper.

    MSD's Replacement Spark Plug Wires and Coil Wires are made with the same Super Conductor wire as their universal and pre-made sets, just longer than normal for custom tailoring when you need that extra length.

    Show More

    Features:

      • Only 40-50 ohms resistance per foot of wire (lowest of any helically-wound wire)
      • MSD Ignition Copper alloy conductors result in less spark energy loss so more reaches spark plugs
      • Over 40 feet of conductor per foot of wire
      • Conductors are wrapped around ferro-magnetic center cores, which effectively suppresses electro magnetic interference
      • Outer sleeves consist of silicone and synthetic material for a strong resistance to heat, abrasion, and tearing.

    JEGS Easy Kits are designed by JEGS high performance racing professionals to help you get all the performance parts you need for your race car, hot rod or truck.

     

    Click to enlarge

    Part TypeSpark Plug Wire
    Product LineMSD Universal Spark Plug/Coil Wire Sets
    BrandMSD IGNITION
    Part CategoryReplacement Parts
    Diameter (Mm)8.5
    Distributor Boot MaterialSilicone
    PositionN/A
    ColorRed
    Wire ColorRed
    QuantitySold as a Kit
    Spark Plug Boot EndsEight 90 degree
    Spark Plug Boot ColorGray
    Distributor Terminal EndsMale/HEI
    Spark Plug Boot MaterialSilicone
    Distributor Boot ColorGray
    Coil Wire IncludedYes
    Rfi SuppressionYes
    Conductor StyleSpiral core
    Part FitmentDirect Fit
    Boot Type90 Degree
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

    Items You Need

    Dielectric Grease, 1 oz. Tube

    JEGS

    Dielectric Grease, 1 oz. Tube

    Part Number : 555-28020
    $499$5.99
    You Save$1.00
    Spark Plug Wire Separators Black

    JEGS

    Spark Plug Wire Separators Black

    Part Number : 555-40320
    $2039$22.99
    You Save$2.60
    Spark Plug Wire Separators Red

    JEGS

    Spark Plug Wire Separators Red

    Part Number : 555-40321
    $2039$22.99
    You Save$2.60
    Spark Plug Wire Separator Kit Black

    JEGS

    Spark Plug Wire Separator Kit Black

    Part Number : 555-40360
    $399$4.29
    You Save$0.30
    Spark Plug Wire Separator Kit Red

    JEGS

    Spark Plug Wire Separator Kit Red

    Part Number : 555-40361
    $399$4.29
    You Save$0.30
    Spark Plug Boot Puller

    JEGS

    Spark Plug Boot Puller

    Part Number : 555-80574
    $739$7.99
    You Save$0.60
    Self-Powered Timing Light [Powered by (2) D-Cell Batteries]

    JEGS

    Self-Powered Timing Light [Powered by (2) D-Cell Batteries]

    Part Number : 555-W80578
    $4799$52.99
    You Save$5.00
    Replacement Boots and Terminals 90° MSD Logo

    MSD IGNITION

    Replacement Boots and Terminals 90° MSD Logo

    Part Number : 121-3311
    $1450$16.11
    You Save$1.61
    Replacement Boots and Terminals 90° HEI

    MSD IGNITION

    Replacement Boots and Terminals 90° HEI

    Part Number : 121-3320
    $1350$15.00
    You Save$1.50
    Dual Plug Wire Separators 8-8.5mm

    MSD IGNITION

    Dual Plug Wire Separators 8-8.5mm

    Part Number : 121-8841
    $3157$35.08
    You Save$3.51
    Pro Clamp Wire Separators Includes: (2) 4-Wire Assemblies

    MSD IGNITION

    Pro Clamp Wire Separators Includes: (2) 4-Wire Assemblies

    Part Number : 121-8843
    $3746$41.62
    You Save$4.16

    ITEM YOU MAY ALSO CONSIDER

    8.5mm Red Ultra Pow'r Wires Small & Big Block Chevy Over Valve Covers or Under Headers

    JEGS

    8.5mm Red Ultra Pow'r Wires Small & Big Block Chevy Over Valve Covers or Under Headers

    Part Number : 555-4020066
    $6799$74.99
    You Save$7.00
    Black 2-in-1 Universal 8.5mm Spark Plug Wire Set 8-cylinder

    MSD IGNITION

    Black 2-in-1 Universal 8.5mm Spark Plug Wire Set 8-cylinder

    Part Number : 121-31233
    $11785$130.95
    You Save$13.10
    Spark Plug Wires V8 Engines

    MOROSO

    Spark Plug Wires V8 Engines

    Part Number : 710-73219
    $12099
    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning
    Your Cart

    Your shopping cart is empty!