Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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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.

"Open Wheel, Spark Plugs, Wires and Accessories" Page 1 of 4

  • Moroso 62160 Spark Plug Indexer, 14MM
    Moroso 62160 Spark Plug Indexer, 14MM
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    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
  • Accel 1858 Red Heat Shrink Sleeves, 4 Pack
    Accel 1858 Red Heat Shrink Sleeves, 4 Pack
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    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 3414 Spark Plug Wire Markers, 8.5MM Wire
    MSD 3414 Spark Plug Wire Markers, 8.5MM Wire
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    These great little markers will save you time and ensure that the plug wires are always in the right place. They will withstand high underhood temperatures and work with 8.5mm wires. These plastic plug wire indicators are white with black lettering and are sold as a set. The Markers are also supplied on a trick orange tool that makes installation effortless.

    • Works with 8.5mm wires
    • Saves time and ensures correct wire location
    • Withstands high underhood temperatures
    • Makes installation effortless
    • Plastic material
  • Moroso 73220 Spiral Core Spark Plug Wires Set, 135 Degree Boot, Blue Max
    Moroso 73220 Spiral Core Spark Plug Wires Set, 135 Degree Boot, Blue Max
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    The superiority of Moroso Blue Max 8mm, 800 ohm spiral core wire comes from over 27 years of continual refinement. The combination of Moroso engineering expertise and a rigorous testing program makes this the finest ignition wire available for street or race. These spark plug wire sets are terminated at the plug end only and include enough wire length and terminals to fit HEI or Non-HEI distributors. You install the distributor ends. Wire color is blue.

    • Optimized combination of capacitance, inductance and resistance
    • Provides more spark energy and EMI protection than any other spiral core wire available
    • Eliminates interference with on-board electronics and provides static-free sound quality for car audio systems
    • Universal plug wire set fits HEI or socket style caps
    • Spark plug terminals and boots factory installed
    • You install distributor ends

    Spark Plug Wire Installation Instructions (PDF)

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

  • MSD 8843 Spark Plug Wire Separators, Pro-Clamp
    MSD 8843 Spark Plug Wire Separators, Pro-Clamp
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    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.

  • Taylor Cable 76240 8mm Spark Plug Wires-Solid Core-Under Headers-90  -Red
    Taylor Cable 76240 8mm Spark Plug Wires-Solid Core-Under Headers-90 -Red
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    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 AR134 14mm Spark Plug-5/8 Hex Taper Seat .46-Slightly Hotter
    Autolite AR134 14mm Spark Plug-5/8 Hex Taper Seat .46-Slightly Hotter
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    Autolite Racing spark plugs feature a cut back ground electrode, anti-corrosive nickel plating, and large ground electrode for better heat transfer. Heat range Slightly Hotter. 

    • Standard tip
    • 14 mm plug
    • .460" reach
    • 5/8" hex
    • Tapered seat
    • Non-resistor
    • Vendor Number: AR134

    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)

  • 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
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    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)

  • Autolite AR132 14mm Spark Plug-5/8 Hex Taper Seat .46-Slightly Colder
    Autolite AR132 14mm Spark Plug-5/8 Hex Taper Seat .46-Slightly Colder
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    Autolite Racing spark plugs feature a cut back ground electrode, anti-corrosive nickel plating, and large ground electrode for better heat transfer. Heat range Slightly Colder. 

    • Standard tip
    • 14 mm plug
    • .460" reach
    • 5/8" hex
    • Tapered seat
    • Non-resistor
    • Vendor Number: AR132

    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 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
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    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
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    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
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                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
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                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
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                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)

  • 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
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    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
    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
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    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
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    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
  • 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
    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)

  • NGK R5671A-10 Spark Plug for Sprint 410 Racing Crate Motors
    NGK R5671A-10 Spark Plug for Sprint 410 Racing Crate Motors
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    Every NGK spark plug is designed to withstand severe mechanical and thermal shock associated with these high-revving, high-compression race crate engines.

    • For aluminum heads flat seat 14mm .708 reach
    • Sprint racing applications
    • 410 engines
    • Sold each
  • Autolite AR2593 14mm Racing Spark Plug 13/16 Hex 3/4 Reach Gasket, Med
    Autolite AR2593 14mm Racing Spark Plug 13/16 Hex 3/4 Reach Gasket, Med
    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. 

    • Non-projected (standard) tip
    • 14 mm plug
    • 3/4" reach
    • 13/16" hex
    • Gasket seat
    • Non-resistor
    • Vendor Number: AR2593

    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)

  • Autolite AR50 Power Tip Spark Plug 13/16 Hx 3/4 Reach Gasket Seat Cold
    Autolite AR50 Power Tip Spark Plug 13/16 Hx 3/4 Reach Gasket Seat Cold
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    Autolite Racing spark plugs feature a cut back ground electrode, anti-corrosive nickel plating, and large ground electrode for better heat transfer. Heat range Cold.  

    • Power Tip (Projected Tip)
    • 14 mm plug
    • 3/4" reach
    • 13/16" hex
    • Gasket seat
    • Non-resistor
    • Vendor Number: AR50

    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)

  • Moroso 72800 Solid Core Spark Plug Wires, Straight Boot, Blue Max
    Moroso 72800 Solid Core Spark Plug Wires, Straight Boot, Blue Max
    x
                Blue Max solid core spark plug wires combine state-of-the-art engineering with the finest workmanship and quality control available! These solid core sets are pre-terminated at the spark plug end and include enough wire, boots and terminals so you can complete the distributor/magneto end. Wire color is blue. Not for use with MSD components. 
    • 8mm super-high-performance wire for racing only
    • Engineered for magneto and other ignitions that do not require electro-magnetic interference (EMI) suppression
    • Combination silver-plated copper and stainless steel "solid core" provides maximum conductivity and strength
    • Each wire individually tested for continuity after termination to ensure race-ready performance
    • Universal set fits both HEI and socket style caps
    • Spark plug terminals and boots factory installed
    • You install distributor ends

    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 76638 8mm Solid Core Spark Plug Wires, Over Valve, HEI, 90
    Taylor Cable 76638 8mm Solid Core Spark Plug Wires, Over Valve, HEI, 90
    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 76238 8mm Spark Plug Wires, Over Valve, HEI, 90  , Solid Core, Red
    Taylor Cable 76238 8mm Spark Plug Wires, Over Valve, HEI, 90 , Solid Core, Red
    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.

    • 90 Degree Boots
    • 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
  • Spark Plug Index Washers, Tapered
    Spark Plug Index Washers, Tapered
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    For use on all 14 mm spark plugs. Ten washers, each of three thicknesses, stamped copper. 30 per package.

    545-71900 Instructions (PDF)

  • Autolite AR3932 14mm Racing Spark Plug-5/8 Hex-Gasket Seat 3/4 Reach
    Autolite AR3932 14mm Racing Spark Plug-5/8 Hex-Gasket Seat 3/4 Reach
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    Autolite Racing spark plugs feature a cut back ground electrode, anti-corrosive nickel plating, and large ground electrode for better heat transfer. Heat range needed with Standard tip or Power tip Medium. 

    • 14 mm plug
    • .75" reach
    • 5/8" hex
    • Gasket seat
    • Non-resistor
    • Vendor Number: AR3932

    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 5551 Street-Fire Spark Plug Wire Set, V8 Multi-Angle, Stock/HEI Universal
    MSD 5551 Street-Fire Spark Plug Wire Set, V8 Multi-Angle, Stock/HEI Universal
    x
                Street Fire Spark Plug Wires feature a low resistance conductor  that’s wrapped in a sleek and durable black sleeve. The terminals are  covered in black boots that protect the conductor from engine heat to  ensure spark delivery.
    • Helically wound conductor suppresses electro and radio noise
    • Kevlar core combination for great strength and durability
    • Heavy duty terminals for secure connection
    • 8mm silicone and synthetic jacket resists heat and abrasion
    • 500 Ohms per foot resistance for improved spark delivery and power
    • Straight silicone boots protect against high exhaust temps

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

  • Autolite AR2592 14mm Racing Spark Plug-13/16 Hex 3/4 Reach-Gasket Seat
    Autolite AR2592 14mm Racing Spark Plug-13/16 Hex 3/4 Reach-Gasket Seat
    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 Cold. 

    • Non-projected (standard) tip
    • 14 mm plug
    • 3/4" reach
    • 13/16" hex
    • Gasket seat
    • Non-resistor
    • Vendor Number: AR2592

    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)

     

  • NGK R5671A-8 Spark Plug for Sprint 305 Racing Engines
    New
    NGK R5671A-8 Spark Plug for Sprint 305 Racing Engines
    x
                
    Every NGK spark plug is designed to withstand severe mechanical and thermal shock associated with these high-revving, high-compression race crate engines.
    • For aluminum heads flat seat 14mm .708 reach
    • Sprint racing applications
    • 305 engines
    • Sold each
  • Accel 8025 8.8 Universal Solid Core Spark Plug Wires Set, Straight Boot
    Accel 8025 8.8 Universal Solid Core Spark Plug Wires Set, Straight Boot
    x
                For high performance ignition wire, there is simply no alternative to Accel 8.8 spark plug wires. 
    • Silver plated copper is combined with a tough inner stainless steel core
    • Ultra strong fiberglass braiding provides unequalled tensile strength and resistance to "wire stretch"
    • Extra thick 8.8mm double-silicone insulation and unique silicone boots provide high dielectric strength and eliminates voltage leaks
    • Temperature Resistance-ACCEL 8.8 wire delivers peak performance even at temperatures over 500 degrees
    • Non RFI suppression
    • Works with HEI or Socket style caps

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

  • Longacre 50886 Spark Plug Viewer with Holder
    Longacre 50886 Spark Plug Viewer with Holder
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    • Get your jetting right for maximum power
    • 10X magnification
    • Durable and compact
    • Comes with batteries - ready to use
    • Includes spark plug holder
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