Review on Kawasaki Ninja 400 Z400 Slip-On Exhaust System Including Muffler For Improved Performance - Compatible With Models From 2018, 2019, And 2020 by Lamar Hopkins

Overall, great product. Only issue was seating piping to stock exhaust. Used a hammer with a shirt wrapped around it as I don’t have a mallet. Worked well.For $90 I don’t think you will find a better exhaust. Looks great and sounds fantastic compared to stock. It also weighs less.I tested stock exhaust then no muffler, after installing I recorded with and without dB killer. Sounds amazing without. Highly recommend