Iron Stable

Harley-Davidson Road Glide 3 Big Bore Kits

Genuine HD big bore kits and aftermarket alternatives that fit the Road Glide 3 — all years. Select your year for exact fitment and pricing.

Select your year for exact fitment & prices

2026202520242023

Genuine Harley-Davidson (1)

This kit was developed for the budget minded rider that wants to experience crisp throttle response and acceleration they can feel at slower speeds. The 5% increase in torque can be felt immediately off the line and continues to build by up to a 14% increase @ 4500 RPM - the ideal power band for passing slow moving vehicles. Delivers enhanced torque and horsepower in the low to mid RPM range. Produces passing power without a downshift or high revs. Minimally invasive, only requiring opening of the cam chest. Retains Original Equipment Factory Warranty. 50-State U.S. EPA compliant.

Genuine Harley-Davidson

This kit was developed for the budget minded rider that wants to experience crisp throttle response and acceleration they can feel at slower speeds. The 5% increase in torque can be felt immediately off the line and continues to build by up to a 14% increase @ 4500 RPM - the ideal power band for passing slow moving vehicles. Delivers enhanced torque and horsepower in the low to mid RPM range. Produces passing power without a downshift or high revs. Minimally invasive, only requiring opening of the cam chest. Retains Original Equipment Factory Warranty. 50-State U.S. EPA compliant.

92500047A
Iron Pass £447.71£526.72View

Aftermarket alternatives

Aftermarket big bore kits that fit the Road Glide 3. Genuine Harley-Davidson is listed above, not here.

Searching aftermarket…