Spark Exhaust Force Evo 350 mm Silencer Group D.60 Titanium Kawasaki ZX-4RR (2023-2026) GKA8852ST
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The 350 millimetre Force Evo case for the ZX-4RR. In Spark's complete system this silencer produces 105 decibels at 7,500 rpm — the figure Spark publishes for the configuration, and the one to check against your paddock's rulebook before ordering.
Key Features
- Force Evo silencer group for the Kawasaki ZX-4RR.
- Titanium case, 350 mm, carbon end cap.
- 105 dB at 7,500 rpm in the complete system.
- 60 mm inlet.
- Supplied ready to mount.
- Racing part, no homologation.
A Groove, Not a Rib
Spark describes the Force Evo case for this motorcycle as streamlined by a groove running along the titanium body and converging towards the lines of the carbon end cap. It is the same design language as the ribbed cases on the larger bikes, drawn tighter for a 400.
The practical effect is the same: a formed sleeve is stiffer than a plain one, so the wall can be thinner without the case ringing at the frequencies a screaming four produces.
105 Decibels Is a Decision
Spark builds four exhaust configurations for the ZX-4RR and each meets a different noise brief. This one sits at 105 dB. The Konix Evo meets the British championship level, the 400 mm Force Evo build reaches 98 dB, and the Grid-O has no limit at all.
If your events publish a number, that number picks the silencer for you. If they do not, 105 dB on a 400 four is a genuinely good noise and this is the case most owners choose.
What Comes With the Complete System
Ordered as the full system GKA8852T, this silencer arrives with the chassis hanger for race use and a second hanger that keeps the passenger footpeg. As a group on its own it is the silencer and its fittings — if you are building from parts, check which hangers you already have.
Fitment & Compatibility
Fits the Kawasaki ZX-4RR of 2023 through 2026 on any Spark collector for this motorcycle. Ordered as a complete system it becomes GKA8852T. If 105 dB is too loud for your paddock, the 400 mm case GKA8855ST is the quieter route; if noise is not an issue at all, look at the Grid-O system GKA8851T instead.
Road Approval
Not approved. The 105 dB figure is a circuit measurement and has nothing to do with road use.
Specifications
- Part number: GKA8852ST
- Type: Silencer group
- Design: Force Evo
- Material: titanium, carbon end cap
- Length: 350 mm
- Inlet: 60 mm
- Noise: 105 dB at 7,500 rpm in the complete system
- Road approval: none, track use
- Fitment: Kawasaki ZX-4RR (2023-2026)
- Manufacturer: Spark Exhaust Technology, Mantova, Italy
| Part number | GKA8852ST |
|---|---|
| Type | Silencer |
| Silencer design | Force Evo |
| Material | Titanium |
| Spark weight | 4.7 kg |
| Standard weight | 9.4 kg |
| Weight saving | 4.7 kg |
| Road approval | None — track use only |
| Sound level | 105 dB at 7,500 rpm |
| Dimensions | Ø 60 mm, 350 mm long |
- Kawasaki ZX-4 RR
- Kawasaki ZX-4R 400
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// Spark Exhaust
Spark Exhaust Force Evo 350 mm Silencer Group D.60 Titanium Kawasaki ZX-4RR (2023-2026) GKA8852ST

Tech specs
- Part number
- GKA8852ST
- Type
- Silencer
- Silencer design
- Force Evo
- Material
- Titanium
- Spark weight
- 4.7 kg
- Standard weight
- 9.4 kg
- Weight saving
- 4.7 kg
- Road approval
- None — track use only
- Sound level
- 105 dB at 7,500 rpm
- Dimensions
- Ø 60 mm, 350 mm long
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
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