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$23.99
Champion 841 J8C Racing Spark Plugs, Gas, 3/8 Reach, Hot, Set/8
Champion 841 J8C Racing Spark Plugs, Gas, 3/8 Reach, Hot, Set/8

Champion 841 J8C Racing Spark Plugs, Gas, 3/8 Reach, Hot, Set/8

Universal Fit, Gasket Spark Plug Seat Style, 0.375" Spark Plug Reach, 14mm Thread Pitch

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Champion 841 J8C Racing Spark Plugs, Gas, 3/8 Reach, Hot, Set/8
Champion 841 J8C Racing Spark Plugs, Gas, 3/8 Reach, Hot, Set/8
Champion 841 J8C Racing Spark Plugs, Gas, 3/8 Reach, Hot, Set/8
Champion 841 J8C Racing Spark Plugs, Gas, 3/8 Reach, Hot, Set/8
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Champion 841 J8C Racing Spark Plugs, Gas, 3/8 Reach, Hot, Set/8
Champion 841 J8C Racing Spark Plugs, Gas, 3/8 Reach, Hot, Set/8
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Part # 9108646
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Details

Spark Plug Seat Style:
Gasket
Spark Plug Reach:
0.375"
Thread Pitch:
14mm
Insulator Type:
Non-projected
Resistor:
No
Spark Plug Heat Range:
8
Core Material:
Copper
Tip Material:
Nickel Alloy
MFG. Part #:
841 J8C
Overall Length:
14.00"
Wrench Size:
13/16"
Operating Temperature:
59 °F
Sold in Quantity:
Kit
Notes:
Set of 8 spark plugs

Info

Outfit your V8 racing engine with this complete Champion spark plug set.

Projected tip for gasoline. For double hump heads. Most popular for IMCA Modifieds. Recommended for gas. 14mm plug, .375" reach, 13/16" hex.

Plug gap will depend on output of distributor and fuel being used. Most applications using methanol will be at .022" - .025". If your ignition sytem is a higher output, maybe able to go as wide as .030". Gas application should be .030" - .035". You should also consult manufacturer of distributor for their recommendations.

Champion Racing Series plugs include all the features of their conventional plugs, but are built with extreme engine conditions and durability in mind.

  • Nickel Alloy Ground and Center Electrodes
  • Copper Core Center Electrode Allows for Increased Conductivity and Heat Control
  • 14mm, .375" reach, 13/16" hex
  • Projected
  • Heat Range: Hot (59)

Champion Spark Plug Guide (GIF)

Champion Heat Range Guide (GIF)

Champion Conversion Chart (GIF)

Spark Plug Gapping Instructions (GIF)

Item Details

14mm, .375" Reach, 13/16" Hex

Notes

While 5/8" (16mm) and 13/16" are the two most common plug hex sizes, plugs can have a hex as small as 8mm or larger than 1".

If you're a tuner or engine builder in search of the perfect spark plug for your current project, pay special attention to the hex size required.  Remember to take into consideration not only the diameter of the cylinder head, but also the added thickness of the plug socket needed for installation.

A spark plugs reach is calculated by the length of the threads.  It is measured from the seat of the plug to the end of the threads.

It should be noted that the reach does not include the electrodes, or an extended metal shell.  When custom-selecting a spark plug, the electrode length and projection should be included in the calculation when taking into consideration the clearance in the combustion chamber.

WARNING: Spark plugs with different seat types are NOT interchangeable.

  • Spark plugs with a flat seat must be used in engines designed for a gasket seal.   
  • Spark plugs with a tapered seat must be used in engines designed for a tapered seal.

 Use of an improper plug in an engine will result in engine damage.

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

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What's In The Kit

Each kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.
  • Champion 841 J8C Racing Spark Plug-Gas, 3/8 Reach, 13/16 Inch Hex, Hot
    Qty x 8

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