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MSD Ignition Black Universal 8.5mm Spark Plug Wire Set 8-Cylinder

121-31223


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MSD Ignition 31223
$113.95
More than 10 available
Black Universal 8.5mm Spark Plug Wire Set
  • 8-Cylinder
  • Distributor Boots: 90° HEI (Male Post)
  • Plug Boots: 90°
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    Does MSD Ignition 31223 fit your vehicle?

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    1975 GMC K15

    • Liter: 5.7
    • SubModel: SIERRA GRANDE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Black Super Conductor; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals
    • CUI: 350
    • Engine Type: V8 ( 5.7L / 350 )
    • Engine Vin: V

    1976 CHEVROLET C10

    • Liter: 6.6
    • SubModel: CUSTOM DELUXE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Black Super Conductor; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals
    • CUI: 400
    • Engine Type: V8 ( 6.6L / 400 )
    • Engine Vin: U

    1980 GMC G1500

    • Liter: 5
    • SubModel: RALLY STX
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Black Super Conductor; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals; This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled [Non-Emissions Controlled] Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
    • CUI: 305
    • Engine Type: V8 ( 5L / 305 )
    • Engine Vin: G

    1976 GMC K25

    • Liter: 5.7
    • SubModel: SIERRA CLASSIC
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Black Super Conductor; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals
    • CUI: 350
    • Engine Type: V8 ( 5.7L / 350 )
    • Engine Vin: L

    1982 CHEVROLET K10

    • Liter: 5.7
    • SubModel: SILVERADO
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Black Super Conductor; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals
    • CUI: 350
    • Engine Type: V8 ( 5.7L / 350 )
    • Engine Vin: L

    1976 OLDSMOBILE DELTA 88

    • Liter: 5.7
    • SubModel: ROYALE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Black Super Conductor; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals
    • CUI: 350
    • Engine Type: V8 ( 5.7L / 350 )
    • Engine Vin: R

    1979 GMC G3500

    • Liter: 6.6
    • SubModel: RALLY STX
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Black Super Conductor; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals
    • CUI: 400
    • Engine Type: V8 ( 6.6L / 400 )
    • Engine Vin: R

    1990 FORD F-250

    • Liter: 5
    • SubModel: XLT LARIAT
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Black Super Conductor; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals; This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled [Non-Emissions Controlled] Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
    • CUI: 302
    • Engine Type: V8 ( 5L / 302 )
    • Engine Vin: N

    1976 CADILLAC CALAIS

    • Liter: 8.2
    • SubModel: BASE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Black Super Conductor; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals
    • CUI: 500
    • Engine Type: V8 ( 8.2L / 500 )
    • Engine Vin: S

    1975 CHEVROLET K10

    • Liter: 6.6
    • SubModel: CHEYENNE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Black Super Conductor; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals
    • CUI: 400
    • Engine Type: V8 ( 6.6L / 400 )
    • Engine Vin: M

    1982 FORD E-350 ECONOLINE CLUB WAGON

    • Liter: 5.8
    • SubModel: BASE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Black Super Conductor; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals
    • CUI: 351
    • Engine Type: V8 ( 5.8L / 351 )
    • Engine Vin: G

    1981 CHEVROLET C20 SUBURBAN

    • Liter: 5.7
    • SubModel: CUSTOM
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Black Super Conductor; 8.5mm; Fits 8 Cyl. Late Model HEI Caps [Ford Duraspark Or MSD Cap-A-Dapt]; Includes: Wires/90 Degree Boots/Terminals
    • CUI: 350
    • Engine Type: V8 ( 5.7L / 350 )
    • Engine Vin: L
    31223 is rated 5.0 out of 5 by 4.
    Rated 5 out of 5 by from best wires I've had Good fit and real good spark at the plugs. All wires were long enough to design my fit.
    Date published: 2016-10-29
    Rated 5 out of 5 by from MSD always ROCK As always MSD products had the correct parts and more than enough wire to build your wires the way you need to run them. The best on the market !!!!!!
    Date published: 2016-08-24
    Rated 5 out of 5 by from Nice wires Much better than the Jegs brand wires I'm replacing. These come with an adequate stripping/crimping tool to aid in assembly. These wires are very long, I used the shortest one supplied for my longest wire.
    Date published: 2016-06-22
    Rated 5 out of 5 by from Perfect wires The wires were perfect. The instructions were thorough, and they came with a handy tool for crimping and cutting the ends.
    Date published: 2015-09-03
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    Please provide the lengths of the wires. I need two to be 47". Thanks

    Asked by: Chulai
    They are [email protected]'' , [email protected]'' , [email protected]'' & [email protected] 32''
    Answered by: SteveM
    Date published: 2019-05-10
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    Items You Need

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

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.

    Tools:

    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.