Harley-Davidson Road King Classic Spark Plugs
Genuine HD spark plugs and aftermarket alternatives that fit the Road King Classic — all years. Select your year for exact fitment and pricing.
Genuine Harley-Davidson (3)
Aftermarket for your Road King Classic
Confirmed to fit your Road King Classic
Aftermarket spark plugs the supplier lists against the Road King Classic. Genuine Harley-Davidson is listed above, not here.
V-Twin
SPARK PLUG AIR COOLED RETRO CONVERSION KIT
In stock
£56.90Iron Pass £48.93£51.21View
Samwel Supplies
SPARK PLUG AIR COOLED RETRO CONVERSION KIT
In stock
£61.43Iron Pass £54.06£56.52View
Nology
NOLOGY SILVER SPARK PLUGS
In stock
£91.88Iron Pass £78.10£82.69View
Accel
Accel, U-groove platinum spark plug set. 12mm
In stock
£59.33Iron Pass £52.21£53.99View
OEM
OEM spark plug SE performance
In stock
£35.27Iron Pass £33.51£34.21View
OEM
OEM spark plug 6R10
In stock
£7.44Iron Pass £7.07£7.22View
NGK
NGK, spark plug Iridium IX DCPR8EIX
In stock
£17.15Iron Pass £14.58£15.44View
NGK
NGK, spark plug Iridium IX DCPR7EIX
In stock
£18.41Iron Pass £15.65£16.57View
NGK
NGK, spark plug Iridium IX CR9EIX
In stock
£15.42Iron Pass £13.11£13.88View
NGK
NGK, spark plug Iridium IX DCPR9EIX
In stock
£19.56Iron Pass £16.63£17.60View
NGK
NGK, spark plug CR9EB
In stock
£9.26Iron Pass £7.87£8.33View
NGK
NGK, spark plug DCPR8E
In stock
£8.03Iron Pass £6.83£7.23View