Moroso High Performance Ultra 40 Ignition Wire - 40/SET `18-UP Softail Models — Harley-Davidson (2018-2020)

Moroso High Performance Ultra 40 ignition wires for 2018-up Harley Softail models, engineered with nickel copper alloy conductors and DuPont Kevlar core for superior spark energy transfer. Silicone boots rated to 600°F and locking stainless steel terminals ensure reliable operation on modern ION-equipped bikes.

Features

• 8.65mm diameter with 40 ohms per foot resistance
• Nickel copper alloy conductors for superior spark energy
• DuPont Kevlar core—four times stronger than standard aramid
• Extra-thick EPDM dielectric layer
• High-temperature silicone boots to 600°F
• Locking stainless steel plug terminals
• 100% compatible with Harley ION sensing ignition coils
• Made in the USA

Specifications

• Brand: Moroso
• Manufacturer Part #: 28645
• UPC: 84663286452
• Resistance: 40 ohms per foot
• Wire Diameter: 8.65mm
• Boot Type: High-temperature silicone
• Terminals: Locking stainless steel
• Weight: 1 lb

Fitment

Fits 2018-up Harley-Davidson Softail models equipped with ION sensing ignition coils.

Frequently Asked Questions

Will these work with my Harley's ION ignition system?

Yes—100% compatible with Harley ION sensing coils on all late-model bikes, including 2018-up Softail.

What makes 40 ohms resistance better than standard wires?

40 ohms per foot is class-leading resistance that optimizes spark energy transfer without signal loss to the ION coil system.

Can these silicone boots handle heat near the engine?

Yes—rated to withstand continuous heat up to 600°F, well above typical Harley engine compartment temperatures.

Are the locking terminals reliable under vibration?

Yes—stainless steel locking terminals grip the coil firmly and stay connected under high engine vibration.

Is this a full set for my Softail?

Yes—this 40-pack contains all eight spark plug wires needed for a complete Softail ignition system.