Moroso

Moroso has earned a reputation for producing high-performance Harley ignition wires and engine components that meet the demands of riders, racers and professional builders. Designed to provide dependable spark delivery, improved electrical performance and long service life, Moroso products help optimize engine efficiency across a wide range of Harley-Davidson models. Whether upgrading an older V-Twin or enhancing a modern Milwaukee-Eight engine, Moroso components are engineered for dependable performance.

The Moroso lineup includes performance spark plug wires, spiral core spark plug wires, suppression core ignition wires, Ultra 40 ignition wire sets, air oil separators, crankcase breather systems and other motorcycle engine components. Available for Touring, Softail, Dyna, Sportster, FXR, Big Twin, Twin Cam and Milwaukee-Eight platforms, these products help improve ignition reliability, reduce electrical interference and minimize oil carryover through the engine's breather system.

Built for both performance upgrades and routine maintenance, Moroso products are trusted by enthusiasts seeking premium Harley spark plug wires, motorcycle breather systems and V-Twin performance parts. Whether you're installing an air oil separator to improve crankcase ventilation or upgrading to premium ignition wires for stronger spark delivery, Moroso provides proven solutions that enhance reliability and performance on every ride.