Harddrive HD Performance Coils - HP Coil EFI TC 2007-2017 — Harley-Davidson Road King, Electra Glide Ultra Classic, Street Glide (2007-2017)

Harddrive HD Performance EFI coils for 2007-2017 Harley-Davidson Twin Cam engines, delivering 30,000 volts with ION Sense feedback compatible with stock EFI systems. Factory-engineered ignition upgrade that improves cold starts, eliminates high-speed misfires, and increases fuel economy.

Features

• 30,000-volt high-power output
• 20% peak spark voltage increase over stock
• ION Sense feedback for EFI compatibility
• Dual Fire and Single Fire capable
• Improves cold starts and fuel mileage

Specifications

• Brand: Harddrive
• Manufacturer Part #: 10-2005
• UPC: 191361439476
• Dimensions: 5 in L × 3 in W × 4 in H
• Weight: 3 lbs
• Country of Origin: China

Fitment

Fits 2007-2017 Harley-Davidson Twin Cam V-twin engines with EFI systems.

Frequently Asked Questions

Will this coil work with my stock Harley ECU?

Yes. ION Sense feedback is engineered for direct compatibility with Harley EFI control units — no tuning required.

What's the voltage increase over factory coils?

Typically 20% or more peak spark voltage increase, which translates to stronger spark at full RPM and in lean-burn conditions.

Does this help with cold starting?

Yes. The higher spark energy improves cold-start reliability and reduces cranking cycles in winter or after long storage.

Will these stop high-speed misfires?

Yes. The increased coil output eliminates high-speed misfires common in stock ignition systems under load.

Do I need to rejet my carburetor or reprogram my ECU?

No — these coils work directly with your stock EFI system. Reprogram is not necessary for bolt-on installation.