Harddrive HD Performance Coils - HP Coil Single Fire M8 Softail 2018-2022 — Harley-Davidson (2018-2024)

Harddrive HD Performance single-fire coil for 2018-2022 Harley-Davidson M8 Softail models. Delivers up to 30,000 volts with 20% higher peak spark voltage than stock, improving cold starting, eliminating high-speed misfire, and boosting fuel economy. ION Sense feedback maintains full compatibility with the stock Harley EFI ECU.

Features

• 30,000 volt high-power output
• 20% higher peak spark voltage vs. stock
• Single-fire configuration for M8 Softail
• ION Sense feedback for OEM ECU compatibility
• Improves starting and eliminates high-speed misfire
• Increases fuel mileage and overall performance

Specifications

• Brand: Harddrive
• Manufacturer Part #: 10-2017
• UPC: 191361439537
• Coil Type: Single Fire
• Voltage Output: 30,000 volts
• Length: 5 in
• Width: 3 in
• Height: 4 in
• Weight: 3 lbs
• Country of Origin: China (Mainland)

Fitment

Fits Harley-Davidson M8 Softail models 2018 through 2022.

Frequently Asked Questions

Will this coil work with my stock Harley ECU?

Yes. ION Sense feedback keeps it fully compatible with the factory EFI system — no tuner required.

What's the voltage output compared to stock?

This coil produces 30,000 volts with peak spark voltage roughly 20% higher than OEM, improving ignition under load and at high RPM.

Does this fix misfire issues?

Yes. The increased spark energy typically eliminates high-speed misfire and improves cold-start reliability.

Is this single-fire or dual-fire?

This is a single-fire coil designed specifically for 2018-2022 M8 Softail. Dual-fire applications require a different part number.

Do I need to rejet or tune my carb?

Not necessary. Spark coils alone do not require carburetor changes. Stock jetting remains appropriate.