The US Hylift Johnson Roller Lifter Set of 4 is specifically designed for Harley Twin Cam engines, compatible with the year 1999. This set of lifters, with the manufacturer part number LIF IS-12D, is a high-quality product from the trusted brand Hylift Johnson. These roller lifters help improve the performance and efficiency of the motorcycle engine, making them a valuable addition to any rider's parts and accessories collection.