Spark Exhaust MotoGP Full System Exhaust Kawasaki Ninja 400 (2018-2023) GKA8825T

Dropping 3.1 kg from your Ninja 400's exhaust system is one of the most rewarding upgrades you can make for everyday riding and occasional track days alike. The Spark Exhaust MotoGP full system — part number GKA8825T — pairs a stainless steel header with a titanium Spark Force slip-on silencer to deliver a measurable improvement in throttle response, chassis dynamics and sound, all without sacrificing the reliability you need on a daily commute.

Key Features

• Significant 3.1 kg weight saving (from 6.6 kg down to 3.5 kg) for sharper handling and improved power-to-weight ratio
• Titanium silencer and titanium end cap combine strength with low mass for genuine performance gains
• Stainless steel header offers long-term durability and high heat resistance through the full rev range
• Removable db-killer lets you dial the sound level to suit the road or a closed circuit — measured at approx. 102 dB at 5,500 rpm with the db-killer fitted
• Complete hardware kit including exhaust springs and all mounting hardware included for a straightforward installation
• Handcrafted in Italy to exacting tolerances, exactly as the MotoGP designation implies

Engineered for the Street and the Circuit

The GKA8825T is designed as a full replacement system, not a simple slip-on retrofit. Replacing the entire stock exhaust from header to silencer outlet means the gains in throttle response and mid-range pull are felt from the moment you pull away in traffic, not just at the top of the rev range. The stainless steel header resists corrosion through wet winters and punishing track sessions in equal measure, while the titanium silencer keeps unsprung and overall weight to a minimum.

Sound and Versatility

With the db-killer in place, the system produces approximately 102 dB at 5,500 rpm — a noticeable step up from stock but still manageable for everyday use. Remove the db-killer for track days and the MotoGP character of the exhaust note becomes immediately apparent. Switching between the two configurations takes minutes and requires no tools beyond those supplied in the mounting kit.

Getting the Best from Your New Exhaust

As with any full system exhaust, a dedicated race map or a custom dyno tune will unlock the full performance potential of the GKA8825T. The Ninja 400's fuel injection system will benefit from recalibration to suit the improved exhaust flow, and the result is a cleaner, more linear power delivery across the entire rev range.

Fitment and Compatibility

This full system exhaust is designed and manufactured specifically for the following:

• Kawasaki Ninja 400 — model years 2018, 2019, 2020, 2021, 2022, 2023

Specifications