Exclusive Harley Fit：1:1 restores Harley - Davidson original ignition coil parameters. Verified by Harley - Davidson official data , original vehicle plug - and - play. No ECU modification needed, installed in 5 minutes, perfectly integrating into Harley's American cruising style.

Powerful Ignition：Using [X] turns of thickened pure copper windings, combined with rare - earth iron cores, 12V input instantly boosts to 28,000 V. Strong spark penetration, even with carbon deposits in the cylinder or high - altitude hypoxia, ignites the mixture instantly. One - click startup, no acceleration hesitation, and a deeper exhaust sound.

Military - Grade Durability：Military - grade epoxy resin potting, more high - temperature resistant and waterproof than original asphalt potting; metal heat - dissipation shell  + heat - dissipation fins. For Harley's large - displacement engines, continuous 6000 - rpm riding keeps the coil temperature below 80℃. Lifespan is 3 times that of the original coil, no breakdowns on long - distance rides .