All Moroso spark plug wires feature silicone plug boots that withstand high temperatures (up to 600°), and have a silicone jacket to reduce heat and chafing. Locking stainless steel terminals that stay connected under high vibration and are fully compatible with the Harley-Davidson® ION sensing coils used on virtually all late model bikes. Moroso High Performance Ignition wire combines state of the art engineering with the Finest “Made In the USA” workmanship and the very highest standards of quality control available.
Moroso 28631 Ultra 40 ignition wires are engineered for high-performance Harley-Davidson ignition systems. Each wire features a silicone plug boot designed to withstand temperatures up to 600°F, along with a silicone jacket that helps reduce heat and chafing. Locking stainless steel terminals help maintain a secure connection under high vibration and are compatible with Harley-Davidson ION sensing coils used on virtually all late-model bikes.
With 40 ohms per foot and dual-layer EPDM and silicone insulation jackets, these Moroso ignition wires are designed for efficient spark transmission in high-compression and high-energy ignition systems. They also provide EMI/RFI insulation to help protect radio, GPS, and other electronics from interference and feedback associated with high-voltage ignition coils.
Moroso 28631 wires are an upgrade option for Stage 2, Stage 3, and Stage 4 bike builds. The set is manufactured in the USA and combines performance-focused engineering with quality-controlled construction.
Features:
- Resistance: 40 ohms per foot
- High-temperature silicone plug boots withstand temperatures up to 600°F
- Silicone jacket helps reduce heat and chafing
- Locking stainless steel terminals help maintain secure connections under high vibration
- Compatible with Harley-Davidson ION sensing coils
- Designed for spark transmission in high-compression and high-energy ignition systems
- EMI/RFI insulation helps reduce interference affecting radio, GPS, and other electronics
- Dual-layer EPDM and silicone insulation jackets
- Suitable for Stage 2, Stage 3, and Stage 4 bike builds
- Made in the USA
Fitment:
Harley Davidson XL1200C Sportster 1200 Custom 2007
Harley Davidson XL1200C Sportster 1200 Custom 2008
Harley Davidson XL1200C Sportster 1200 Custom 2009
Harley Davidson XL1200C Sportster 1200 Custom 2010
Harley Davidson XL1200C Sportster 1200 Custom 2011
Harley Davidson XL1200C Sportster 1200 Custom 2012
Harley Davidson XL1200C Sportster 1200 Custom 2013
Harley Davidson XL1200C Sportster 1200 Custom 2014
Harley Davidson XL1200C Sportster 1200 Custom 2015
Harley Davidson XL1200C Sportster 1200 Custom 2016
Harley Davidson XL1200C Sportster 1200 Custom 2017
Harley Davidson XL1200CX Roadster 2016
Harley Davidson XL1200CX Roadster 2017
Harley Davidson XL1200L Sportster 1200 Low 2007
Harley Davidson XL1200L Sportster 1200 Low 2008
Harley Davidson XL1200L Sportster 1200 Low 2009
Harley Davidson XL1200L Sportster 1200 Low 2010
Harley Davidson XL1200L Sportster 1200 Low 2011
Harley Davidson XL1200N Nightster 2007
Harley Davidson XL1200N Nightster 2008
Harley Davidson XL1200N Nightster 2009
Harley Davidson XL1200N Nightster 2010
Harley Davidson XL1200N Nightster 2011
Harley Davidson XL1200N Nightster 2012
Harley Davidson XL1200R Roadster 2007
Harley Davidson XL1200R Roadster 2008
Harley Davidson XL1200T Super Low Touring 2014
Harley Davidson XL1200T Super Low Touring 2015
Harley Davidson XL1200T Super Low Touring 2016
Harley Davidson XL1200T Super Low Touring 2017
Harley Davidson XL1200V Seventy Two 2012
Harley Davidson XL1200V Seventy Two 2013
Harley Davidson XL1200V Seventy Two 2014
Harley Davidson XL1200V Seventy Two 2015
Harley Davidson XL1200V Seventy Two 2016
Harley Davidson XL1200X Forty-Eight 2010
Harley Davidson XL1200X Forty-Eight 2011
Harley Davidson XL1200X Forty-Eight 2012
Harley Davidson XL1200X Forty-Eight 2013
Harley Davidson XL1200X Forty-Eight 2014
Harley Davidson XL1200X Forty-Eight 2015
Harley Davidson XL1200X Forty-Eight 2016
Harley Davidson XL1200X Forty-Eight 2017
Harley Davidson XL883 Sportster 883 2007
Harley Davidson XL883 Sportster 883 2008
Harley Davidson XL883C Sportster 883 Custom 2007
Harley Davidson XL883C Sportster 883 Custom 2008
Harley Davidson XL883C Sportster 883 Custom 2009
Harley Davidson XL883L Super Low 2007
Harley Davidson XL883L Super Low 2008
Harley Davidson XL883L Super Low 2009
Harley Davidson XL883L Super Low 2010
Harley Davidson XL883L Super Low 2011
Harley Davidson XL883L Super Low 2012
Harley Davidson XL883L Super Low 2013
Harley Davidson XL883L Super Low 2014
Harley Davidson XL883L Super Low 2015
Harley Davidson XL883L Super Low 2016
Harley Davidson XL883L Super Low 2017
Harley Davidson XL883N Iron 883 2009
Harley Davidson XL883N Iron 883 2010
Harley Davidson XL883N Iron 883 2011
Harley Davidson XL883N Iron 883 2012
Harley Davidson XL883N Iron 883 2013
Harley Davidson XL883N Iron 883 2014
Harley Davidson XL883N Iron 883 2015
Harley Davidson XL883N Iron 883 2016
Harley Davidson XL883N Iron 883 2017
Harley Davidson XL883R 883 Roadster 2007
