Spark Exhaust Force EVO Stainless Full System Exhaust – Kawasaki ZX-4RR (2023-2026) GKA8852T

A genuine 3.7 kg weight saving from a bolt-on full system exhaust — that is the everyday case for fitting the Spark Exhaust Force EVO to your Kawasaki ZX-4RR. Whether you ride road, track days or both, this stainless and titanium assembly sharpens throttle response, frees up weight the chassis immediately notices, and delivers a soundtrack that matches the ZX-4RR's four-cylinder character without demanding a complete remap before you leave the paddock.

Key Features

• Full system replaces headers and silencer: total weight drops from 9.4 kg to 4.7 kg — a 3.7 kg reduction that benefits handling as much as outright performance.
• Stainless steel header construction for long-term corrosion resistance, daily commuting durability and consistent heat management.
• Titanium Force EVO slip-on silencer with carbon end cap — premium materials without the premium weight penalty.
• Removable dB-killer lets you tailor the noise output: 105 dB at 7,500 rpm without it, or drop to 98 dB at 7,500 rpm using the specialist dB-killer set developed in collaboration with Kawasaki Deutschland.
• All exhaust springs and a complete fitting kit are included so installation is straightforward from the first session.
• Made in Italy — hand-crafted in Spark's Italian facility for the quality tolerances that direct-fit performance parts demand.

Build Quality and Daily Usability

The combination of a stainless steel header and titanium silencer is a considered choice rather than a cosmetic one. Stainless steel handles the sustained heat cycles and occasional moisture that road use brings, while titanium keeps the silencer mass low without sacrificing structural integrity. The carbon end cap is bonded cleanly to the titanium body, resisting the knocks of trackside paddock life as well as kerb-side urban parking.

Because the dB-killer is removable rather than permanent, you are not locked into one configuration. For road use or noise-restricted track day sessions, refit the killer and retain a 98 dB output using the specialist set. For open-pit-lane lapping, pull it and let the inline-four breathe fully at 105 dB. Both figures are measured at 7,500 rpm, so there is a genuine, quantified reference point rather than a vague claim.

Track Development and Tuning

This full system was developed in close collaboration with Kawasaki Deutschland, which means fitment geometry and back-pressure characteristics have been validated against the production ZX-4RR rather than extrapolated from a generic template. The improved throttle response is present from standard mapping, but Spark and Inter-Pace recommend a dedicated race map or a dyno session to realise the full potential of the freer-flowing system. If you need guidance on the specialist 98 dB dB-killer set for noise-regulated circuits, contact our team directly.

Fitment and Compatibility

This exhaust is designed exclusively for the following model:

• Kawasaki ZX-4RR — model years 2023, 2024, 2025, 2026

Specifications