This is a sealed pack of TWO NGK spark plugs; As you can see by the packaging, these are GENUINE NGK plugs and if you are not 100% satisfied, I will accept a return, no questions asked!  I had these for a project but just never got around to it.  The photos are of the EXACT plugs you will get, NOT stock photos!  Feel free to ask any questions you may have!! Here are some specs:

ere are the specifications for the NGK Spark Plug (DCPR6E 3481) (part number DCPR6E, NGK #3481)

🔧 Physical & Performance Specs

  • Thread Diameter: 12 mm 

  • Thread Pitch: 1.25 mm

  • Reach (Thread Length): ~19 mm (3/4″)

  • Heat Range: 6 (mid-range; moderate operating temperatures)

  • Spark Gap (factory): ~0.9 mm (~0.035″) 

  • Hex Size: 16 mm (5/8″) 

  • Seat Type: Gasket (flat seat) 

  • Resistor Plug: Yes (≈5000 Ω resistance to suppress ignition noise) 

  • Terminal: Solid

  • Electrode Materials:
    • Center Electrode: Copper core with nickel tip
    • Ground Electrode: Nickel alloy

📌 Key Traits

  • Heat rating “6”: In NGK’s numbering system, lower numbers are hotter and higher numbers are colder; 6 is a typical mid-range heat rating suitable for a variety of engines. 

  • Resistor design: Helps reduce electronic interference with ignition systems and radios.

  • Standard plug design: Not a precious-metal or iridium plug — good for OE replacement or general use where nickel alloy plugs are specified. 

🛠️ Typical Applications


The NGK DCPR6E (stock #3481) is a standard-range resistor spark plug (12 mm thread, 19 mm reach, .035″ gap) used widely across powersports, marine, and small-engine applications — not typical passenger cars. Fitment includes: 

🏍 Motorcycles

  • Harley-Davidson Dyna models:

    • Convertible (FXDS-CONV) — 1999–2000

    • Fat Bob (FXDF) — 2008–2017

    • Low Rider (FXDL) — 1999–2005, 2007–2008, 2009, 2014–2017

    • Street Bob (FXDB) — 2006–2017

    • Super Glide (FXD / FXDC) — 1999–2014 

🏍 Honda Motorcycles (VT/VTX)

  • Honda VT/VTX1300 series (various trims) – 2003–2016
    E.g., VTX1300S, VTX1300C, VTX1300R, VTX1300T, VT1300CXA, Fury models — 2003 through mid-2010s

🛵 Victory Motorcycles

  • Victory 1500 cruisers (Standard, Sport Cruiser, Special Edition) — 1999–2002

⚓ Marine & Other

  • Used in various outboard engines (Johnson, Mercury, Mariner, Nissan/Tohatsu) and small engines in powersports/ATVs — listed as equivalent plug in some references