99063-2 Severe Duty stainless valves, exhaust. Conversion

These Manley Severe Duty exhaust valves are specifically engineered for 883 to 1200 conversions on 1986 to 2003 Sportsters. Sold as a pair, they maintain the standard 883 valve length but utilize the larger 1.48-inch head diameter found on 1200cc models. This combination is essential for maximizing the flow and performance of a converted engine. Like all Manley Severe Duty valves, they are made from high-temperature stainless alloy with swirl-polished heads and chrome-plated stems. They are significantly lighter than stock components, providing the valvetrain stability needed at high RPMs. These valves are the professional choice for ensuring your Sportster conversion breathes as efficiently as possible.