Akrapovic Slip-On Line Muffler for 2018-2023 Kawasaki Ninja 400 / 2019-2023 Z400 | Titanium | S-K4SO7-HRT

The Akrapovič Slip-On Line muffler S-K4SO7-HRT is a titanium slip-on exhaust for the 2018-2023 Kawasaki Ninja 400 and 2019-2023 Kawasaki Z400, replacing the oversized factory silencer with a compact Akrapovič titanium canister that bolts directly to the stock header.

This fits the Ninja 400 and Z400 only — not the Ninja 500 or Z500. Kawasaki replaced the Ninja 400 with the Ninja 500 for 2024, and although the two bikes look nearly identical the exhaust is not shared. If you ride a 2024 or later Ninja 500 or Z500, this muffler will not fit.

The Ninja 400's stock silencer is enormous relative to the motorcycle — Kawasaki sized it for noise and emissions compliance on a bike that weighs a little over 360 lb wet. Replacing it with titanium removes a meaningful percentage of the machine's total mass from the worst possible location, high and behind the rear axle, and transforms how the bike looks from the side. The parallel twin also gains a genuine exhaust note in place of the stock system's near-silence.

• Titanium muffler construction
• Bolt-on installation to the stock header — no other modification required
• Large weight saving as a percentage of a lightweight 400 cc machine
• Akrapovič Slip-On Line — the first stage of the Akrapovič system for this bike
• Can be paired with the Akrapovič E-K4R2 optional header to build a full system
• Covers both the faired Ninja 400 and the naked Z400
• Made in Slovenia by Akrapovič

Fits the 2018-2023 Kawasaki Ninja 400, 2018-2023 Kawasaki Ninja 400 ABS and 2019-2023 Kawasaki Z400. It does not fit the 2024-2026 Kawasaki Ninja 500 or Z500.