18031-86 Extreme Duty Valves

Upgrade your Sportster's cylinder heads with these AV&V Extreme Duty valves, designed for superior strength and longevity. Each valve is forged from a single piece of racing-grade stainless steel and finished with a black liquid nitride coating. This process ensures the valve is harder and smoother than original equipment, reducing wear on both the valve and the guide. The stems are centerless ground to a micro finish and include a 45-degree angle below the lock groove to make valve seal installation straightforward and safe. These valves are a direct replacement for OEM number 18031-86 and are specifically tailored for Harley-Davidson Sportster models. They offer the precision and heat resistance required for demanding riding conditions and high-performance engine configurations.