Easy installation Installs in the original position without any modification needed. Performance and comfort Exhaust muffler smooths exhaust flow and can improve power, delivering a stable performance for a quieter and more comfortable ride. Compatibility and fit Designed for Kawasaki Ninja 400 and Z400 models from 2017 to 2023 (2017, 2018, 2019, 2020, 2021, 2022, 2023). Connection is a modified slipon middle link pipe with a 51mm muffler. Noise reduction Specifically engineered to reduce the noise of motorcycle engines, helping maintain a quieter ride and minimize noise disturbances. Key specifications 51mm muffler with a modified slipon middle link pipe. No modification required for installation; aligns with the original mounting points. Use scenarios Daily urban commuting on Ninja 400 / Z400 20172023: quieter operation and smoother exhaust for a more comfortable city ride. Weekend rides and highway cruising: reduced engine noise and smoother performance enhance longdistance comfort. Upgrading or replacing stock system: a direct fit for models with a 51mm connection, enabling a straightforward upgrade without altering the bike's original setup.