All new split clamp design improves comfort over previous design with sharper handling and a more planted front end feel than the stock 22mm clamps. Ride Eng. recommends the 20mm offset on the 2010-2015 YZ450f and for the 2016-2023 YZ250f. Add a Showa steering dampener (2010-2022 YZ450F, 2014-2023 YZ250F) to improve control entering and exiting rough corners and in deep ruts. Most riders upgrade the bar mount to our one-piece design that reduces handlebar twist in the event of a crash (YZ-BBM00-CA) however OEM bar mounts, rubber cones and nuts all fit. Made from 2024 aluminum (same alloy the factory teams use) weight saved is about 7oz over stock. Included in kit: Top clamp; Bottom clamp, pressed in stem, lower bearing and pinch bolts. Usually compatible with aftermarket stabilizers, call the manufacturer to confirm.