Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Spark Plugs, Wires and Accessories

Shop Open Wheel Ignition At Speedway Motors

Speedway Motors is your number one source for high performance open wheel racing ignition components. Our great assortment of magnetos, distributor gears, and racing ignition coils are sure to light your fire. Plus, Speedway stocks a complete listing of sprint car or midget racing spark plugs and wires for all racing applications.

Featured Products
  • Autolite AR133 14mm Racing Spark Plug-5/8 Hex, Tapered, .46 Reach, Med
    Autolite AR133 14mm Racing Spark Plug-5/8 Hex, Tapered, .46 Reach, Med
    (Part #373133)
    x
                

    Autolite Racing spark plugs feature a cut back ground electrode, anti-corrosive nickel plating, and large ground electrode for better heat transfer. Heat range Medium. 

    • Standard tip
    • 14 mm plug
    • .460" reach
    • 5/8" hex
    • Tapered seat
    • Non-resistor
    • Vendor Number: AR133

    Note: Please use the Vendor Number to reference the PDF chart links listed.

    Heat Range Chart (PDF)

    Racing Plug Tech Note (PDF)

    Understanding Heat Range (PDF)

    Autolite Cross Reference Chart (PDF)

  • Taylor Cable 76640 8mm Solid Core Wires, Under Headers, HEI, 90  , Blue
    Taylor Cable 76640 8mm Solid Core Wires, Under Headers, HEI, 90 , Blue
    (Part #69876640)
    x
                

    Taylor Cable’s 8mm Spiro-Pro Series outperforms the competition in both looks and performance at a price you can afford. Spiro-Pro is simply a top of the line high performance 8mm ignition wire and is an excellent choice for race only applications with it's solid wire core.

    • High grade silicone over silicone resists temperatures up to 600°
    • Color coordinated silicone boots add a touch of class
    • HEI boots have "Professional Grips" for easy on/off installation
    • Double spring locking spark plug terminals provide a firm grip
    • Wire core for racing applications
    • Use with magnetos and point style ignition systems (non electronic)
    • Fully assembled
    • Coil wire is 35" long and requires final assembly
  • MSD 31549 Sprint Car Spark Plug Wires Set, Tight-Fit
    MSD 31549 Sprint Car Spark Plug Wires Set, Tight-Fit
    (Part #54731549)
    x
                

    Close fit 8.5mm plug wires for Pro-Mag.

    MSD Rebate (Link)

     

  • Taylor Cable Products 043392 Spark Plug Boot Removal Tool
    Taylor Cable Products 043392 Spark Plug Boot Removal Tool
    (Part #69843392)
    x
                Avoid those hot headers or manifolds with this handy boot removal tool. Reach down, catch the boot, and pull it off the spark plug without any damage to the boot, plug wire or your hands.
            
  • Spark Plug Index Washers, Tapered
    Spark Plug Index Washers, Tapered
    (Part #54571900)
    x
                

    For use on all 14 mm spark plugs. Ten washers, each of three thicknesses, stamped copper. 30 per package.

    545-71900 Instructions (PDF)

  • Accel 1858 Red Heat Shrink Sleeves, 4 Pack
    Accel 1858 Red Heat Shrink Sleeves, 4 Pack
    (Part #1051858)
    x
                

    These red shrink tubes work perfect for sealing battery terminal connections.  They protect battery to cable connections by creating a water tight seal. 

    • Ideal for use on battery cable connections or spark plug wires
    • 4 sleeves in a kit at 4 inches long each
  • MSD 8843 Spark Plug Wire Separators, Pro-Clamp
    MSD 8843 Spark Plug Wire Separators, Pro-Clamp
    (Part #5478843)
    x
                

    Separate your plug wires to keep them from arcing across one another with these MSD Pro-Clamp wire separators.

    Set is supplied with two 4-wire, two 3-wire, and four 2-wire separators.

    MSD Rebate (Link)

  • Moroso 62160 Spark Plug Indexer, 14MM
    Moroso 62160 Spark Plug Indexer, 14MM
    (Part #54562160)
    x
                

    High-compression drag race engines require “indexing” of spark plugs to prevent contact between piston dome and ground wire of the spark plugs. Moroso’s indexer, designed for both flat and taper-seat 14mm spark plugs, enables selection of spark plugs that will not make such contact. Once a given plug is selected (placed in a cylinder head and found to have the correct ground wire position), it is placed in the Moroso Plug Indexer and the position of the ground electrode marked on the black anodized surface. Marking provides a reference for checking other plugs to be used in the same cylinder.

    • Designed for both flat and tapered seat 14 mm spark plugs
    • Black anodized for easy marking
    • Hex-head design allows it to be held in a vise

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  • Champion 670 V59C 14mm Racing Spark Plug-.46 In Reach, 5/8 In Hex, Hot
    Champion 670 V59C 14mm Racing Spark Plug-.46 In Reach, 5/8 In Hex, Hot
    (Part #271V59C)
    x
                

    Champion Racing Series plugs include all the features of their conventional plugs, but are built with extreme engine conditions and durability in mind.  For GM & Ford cast iron cylinder heads and some OE design aluminum heads. Will not fit GT40 heads.

    • Nickel Alloy Ground and Center Electrodes
    • Copper Core Center Electrode Allows for Increased Conductivity and Heat Control
    • Peanut Plug
    • 14mm, .460" reach, 5/8" hex
    • Projected Tip
    • Heat Range: Hot (59)

    Champion Spark Plug Guide (GIF)

    Champion Heat Range Guide (GIF)

    Champion Conversion Chart (GIF)

    Spark Plug Gapping Instructions (GIF)

    Autolite, Champion, NGK Cross Reference Chart (PDF)

  • Taylor Cable 76640 8mm Solid Core Wires, Under Headers, HEI, 90  , Blue
    Taylor Cable 76640 8mm Solid Core Wires, Under Headers, HEI, 90 , Blue
    (Part #69876640)
    x
                

    Taylor Cable’s 8mm Spiro-Pro Series outperforms the competition in both looks and performance at a price you can afford. Spiro-Pro is simply a top of the line high performance 8mm ignition wire and is an excellent choice for race only applications with it's solid wire core.

    • High grade silicone over silicone resists temperatures up to 600°
    • Color coordinated silicone boots add a touch of class
    • HEI boots have "Professional Grips" for easy on/off installation
    • Double spring locking spark plug terminals provide a firm grip
    • Wire core for racing applications
    • Use with magnetos and point style ignition systems (non electronic)
    • Fully assembled
    • Coil wire is 35" long and requires final assembly
  • Taylor Cable 70650 8mm Spark Plug Wires, 90 Deg Boot, Wire Core, Blue
    Taylor Cable 70650 8mm Spark Plug Wires, 90 Deg Boot, Wire Core, Blue
    (Part #69870650)
    x
                Taylor 8mm Pro Wires are the ultimate in spark plug wires for serious racing machines. 
    • High grade silicone over silicone resists temperatures up to 600°
    • Color coordinated silicone boots add a touch of class
    • HEI boots have "Professional Grips" for easy on/off installation
    • Double spring locking spark plug terminals provide a firm grip
    • Wire core for racing applications
    • Universal fit for HEI and socket style caps 

    Recommended for use with Vertex Magnetos.

    8mm Pro Wire Application Chart (GIF)

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

  • Taylor Cable 70250 8mm Spark Plug Wires, Wire Core, 90 Degree, Red
    Taylor Cable 70250 8mm Spark Plug Wires, Wire Core, 90 Degree, Red
    (Part #69870250)
    x
                Taylor 8mm Pro Wires are the ultimate in spark plug wires for serious racing machines. 
    • High grade silicone over silicone resists temperatures up to 600°
    • Color coordinated silicone boots add a touch of class
    • HEI boots have "Professional Grips" for easy on/off installation
    • Double spring locking spark plug terminals provide a firm grip
    • Wire core for racing applications
    • Universal fit for HEI and socket style caps 

    Recommended for use with Vertex Magnetos.

    8mm Pro Wire Application Chart (GIF)

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

  • Shim-Dex Spark Plug Shims, 24 Pack
    Shim-Dex Spark Plug Shims, 24 Pack
    (Part #94051500)
    x
                These stackable spark plug shims rotate the ground of the spark plug at 30 degree intervals anywhere within 360 degrees so that you get the most out of your spark plugs without causing overheat and pre-ignition due to thread exposure.
    • Shim-Dex shims rotate the ground of the spark plug at 30 degree intervals anywhere within 360 degrees
    • You won't have to buy extra spark plugs to have them perfectly indexed
    • Shim-Dex shims are reusable many times over
    • Minimal or no thread exposure in the cylinder head that can overheat and cause pre-ignition
    • Shim-Dex shims are so thin they will not adjust the gap too far out of the combustion chamber and negatively affect performance
    • Pack includes 12 silver 60 degree shims and 12 black 90 degree shims

    Indexing Your Spark Plugs (PDF)

  • Taylor Cable 76240 8mm Spark Plug Wires-Solid Core-Under Headers-90
    Taylor Cable 76240 8mm Spark Plug Wires-Solid Core-Under Headers-90
    (Part #69876240)
    x
                

    Taylor Cable’s 8mm Spiro-Pro Series outperforms the competition in both looks and performance at a price you can afford. Spiro-Pro is simply a top of the line high performance 8mm ignition wire and is an excellent choice for race only applications with it's solid wire core.

    • High grade silicone over silicone resists temperatures up to 600°
    • Color coordinated silicone boots add a touch of class
    • HEI boots have "Professional Grips" for easy on/off installation
    • Double spring locking spark plug terminals provide a firm grip
    • Wire core for racing applications
    • Use with magnetos and point style ignition systems (non electronic)
    • Fully assembled
    • Coil wire is 35" long and requires final assembly
  • Autolite AR94  Spark Plug-5/8 Hex, .708 Reach, Tapered, Power Tip, Hot
    Autolite AR94 Spark Plug-5/8 Hex, .708 Reach, Tapered, Power Tip, Hot
    (Part #37394)
    x
                

    Autolite Racing spark plugs feature a cut back ground electrode, anti-corrosive nickel plating, and large ground electrode for better heat transfer. Heat range Hot. 

    • Power Tip
    • 14mm plug
    • .708" reach
    • 5/8 hex
    • Tapered seat
    • Non-resistor
    • Vendor Number: AR94

    Note: Please use the Vendor Number to reference the PDF chart links listed.

    Heat Range Chart (PDF)

    Racing Plug Tech Note (PDF)

    Understanding Heat Range (PDF)

    Autolite Cross Reference Chart (PDF)

     

  • Champion 668 V55C 14mm Alky Spark Plug, .46 Reach 5/8 Inch Hex, Colder
    Champion 668 V55C 14mm Alky Spark Plug, .46 Reach 5/8 Inch Hex, Colder
    (Part #271V55C)
    x
                

    Champion Racing Series plugs include all the features of their conventional plugs, but are built with extreme engine conditions and durability in mind.  For GM & Ford cast iron cylinder heads and some OE design aluminum heads. Will not fit GT40 heads.

    • Nickel Alloy Ground and Center Electrodes
    • Copper Core Center Electrode Allows for Increased Conductivity and Heat Control
    • Peanut Plug
    • 14mm, .460" reach, 5/8" hex
    • Projected Tip
    • Recommended for Alcohol
    • Heat Range: Colder (55)

    Champion Spark Plug Guide (GIF)

    Champion Heat Range Guide (GIF)

    Champion Conversion Chart (GIF)

    Spark Plug Gapping Instructions (GIF)

    Autolite, Champion, NGK Cross Reference Chart (PDF)

  • Autolite AR13 14mm Racing Spark Plug, 5/8 Hex-Tapered Seat, .460 Reach
    Autolite AR13 14mm Racing Spark Plug, 5/8 Hex-Tapered Seat, .460 Reach
    (Part #37313)
    x
                

    Autolite Racing spark plugs feature a cut back ground electrode, anti-corrosive nickel plating, and large ground electrode for better heat transfer. Heat range Colder. 

    • Standard tip
    • 14 mm plug
    • .460" reach
    • 5/8" hex
    • Tapered seat
    • Non-resistor
    • Vendor Number: AR13

    Note: Please use the Vendor Number to reference the PDF chart links listed.

    Heat Range Chart (PDF)

    Racing Plug Tech Note (PDF)

    Understanding Heat Range (PDF)

    Autolite Cross Reference Chart (PDF)

     

     

     

  • MSD Black Close Fit Spark Plug Wire Kit, Pro Mag Magnetos
    MSD Black Close Fit Spark Plug Wire Kit, Pro Mag Magnetos
    (Part #54731543)
    x
                

    These close fit spark plug wires will work great with your MSD Pro Mag magneto. They feature a helically wound core, just 40-50 ohms of resistance per foot, RFI suppression equal to a 1500 ohm wire, high temp boots, and dual crimp stainless steel terminals feature snap locks for a secure fit.

    • Close fit 8.5mm wires for MSD Pro Mag
    • Helically wound core, just 40-50 ohms of resistance per foot, RFI suppression equal to a 1500 ohm wire
    • Each foot of finished wire features 40 ft. of tight wound copper
    • 8.5mm synthetic/silicone jacket over extra heavy glass braid and dielectric insulator keeps current guided to plugs
    • High temp boots, dual crimp stainless steel terminals feature snap locks for a secure fit

    MSD Rebate (Link)

  • Moroso 62160 Spark Plug Indexer, 14MM
    Moroso 62160 Spark Plug Indexer, 14MM
    (Part #54562160)
    x
                

    High-compression drag race engines require “indexing” of spark plugs to prevent contact between piston dome and ground wire of the spark plugs. Moroso’s indexer, designed for both flat and taper-seat 14mm spark plugs, enables selection of spark plugs that will not make such contact. Once a given plug is selected (placed in a cylinder head and found to have the correct ground wire position), it is placed in the Moroso Plug Indexer and the position of the ground electrode marked on the black anodized surface. Marking provides a reference for checking other plugs to be used in the same cylinder.

    • Designed for both flat and tapered seat 14 mm spark plugs
    • Black anodized for easy marking
    • Hex-head design allows it to be held in a vise
  • Champion 671 V57YC 14mm Alky Racing Spark Plug-.46 In Reach-5/8 In Hex
    Champion 671 V57YC 14mm Alky Racing Spark Plug-.46 In Reach-5/8 In Hex
    (Part #271V57YC)
    x
                

    Champion Racing Series plugs include all the features of their conventional plugs, but are built with extreme engine conditions and durability in mind.  For GM & Ford cast iron cylinder heads and some OE design aluminum heads. Will not fit GT40 heads.

    • Nickel Alloy Ground and Center Electrodes
    • Copper Core Center Electrode Allows for Increased Conductivity and Heat Control
    • Peanut Plug
    • 14mm, .460" reach, 5/8" hex
    • Projected Core Nose
    • Heat Range: Colder (57)

    Champion Spark Plug Guide (GIF)

    Champion Heat Range Guide (GIF)

    Champion Conversion Chart (GIF)

    Spark Plug Gapping Instructions (GIF)

    Autolite, Champion, NGK Cross Reference Chart (PDF)

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