18030-86 Extreme Duty Valves

For Sportster owners looking to upgrade their valvetrain, these AV&V Extreme Duty valves are a significant step up from stock. Each valve is one-piece forged from a racing-grade stainless steel alloy and undergoes a liquid nitriding process. This black nitride coating makes the valve surface smoother and harder than standard replacements, reducing friction and wear. The stems are centerless ground to a micro finish and feature a 45-degree angle below the lock groove, which makes installing valve seals much easier without risking damage. These valves are built to withstand the rigours of high-performance use while maintaining a perfect seal. This part is a direct replacement for OEM number 18030-86 and fits Harley-Davidson Sportster models.