DK Custom Products

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409 PRO RACE Red Spark Plug Wires - Ready to Install

Availability: In stock
Item #: DK-WRS-RED-10
Manufacturer: DK Custom Products

DK Custom 409 PRO RACE Red Spark Plug Wires - Ready to Install Harley High Performance Maximum Fire Power Silicone ECM Coil Relocation Harley Davidson

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by Taylor Cable

High Performance

Red Spark Plug Wires

Made In The USA



  • "409" PRO RACE wires provide continuous heat protection up to 600 degrees Farenheit.
  • The 10.4mm wires deliver 102,000 volts dielectric strength.
  • Spiral-Wound core with 350 ohms per foot resistance for EMI and RFI suppression delivers the Maximum Fire Power without radio interference.
  • Designed for use with electronic ignition systems found on Harley-Davidsons. They are 100% compatible with the Ion Sensing Knock Retard System used by Harley-Davidson.
  • Low Profile 100% silicone PRO BOOTS feature vibration proof double spring locking spark plug terminals.
  • Also available in Black.
  • Perfect for DK Custom Coil & Coil Key Relocation Kits.


These Premium Race-Ready Wires are 10" from end to end. 

Custom made for DK Custom Coil Relocation Kits for:





You Won't Find a Better Wire For Your HARLEY


These will not fit 1995-2003 Sportster Coils.  Click this LINK to see the wires that fit 1995-2003 Sportsters

These are the Plug Wires you need for the 2004-2006 Sportsters with a coil relocation, click this LINK. Also available in Black, HERE.

They are also available in 24" lengths.  See HERE.


I just installed these yesterday and went for a ride.  It may be my imagination, but my "seat of the pants dyno" said I had MORE power!  They look good too!  Thanks!  -Jimmy


"409” ignition wires provide continuous heat protection up to 600-degrees Fahrenheit

Customer Reviews

Very nice! Review by Jaymo
These 409 pro race red spark plug wires look great on my 2010 dyna wide glide, they have that old school look I’m looking for, paired up with Dk custom coil relocation kit make’s it look awesome, looking forward to spring time for that first fire up and ride! (Posted on 2/8/2021)
Great product Review by James
High quality, perfect fit (Posted on 6/9/2020)
They fit and I like the red color. Review by Richard
They fit and I like the red color. Nice that they are offered with the kit so I don't have to make up a set. (Posted on 6/4/2020)
eye catcher! Review by oneupyours
everyone is full of "dude those are bad ass where'd you get those?" fits perfect for the coil relocation on my 2018 HD48! (Posted on 5/11/2020)
409 Review by Sparky
Dk customs was very quick , after I ordered these plugs they look great and are built solid. love them (Posted on 4/29/2020)
Awesome customer service Review by Steve
Dk customs was very quick to respond to me even with the current pandemic. I ordered these plugs they look great and are built solid. I received these plugs within 2 days of ordering! I have done business with dk before and i plan to use again! (Posted on 4/14/2020)
Just the thing I needed Review by Dave
Ordered the 409 Pro Race wires and they’re awesome. Was having some issues with uneven burn in the cylinders and these seemed to have cleared my recurring fault code. To top it off, the red wires add just the right amount of color. (Posted on 4/29/2019)
Good quality part. Review by JB
These are the biggest plug plug wires I have ever put on a gas engine. Looks great and excellent quality. (Posted on 3/19/2019)

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