Spark Exhaust Force Evo Silencer Group D.65 400 mm Titanium Yamaha R6 / YZF-R6 Race (2017-2026) GYA8873ST
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The Force Evo case for the STEP 3 kit, supplied as a mountable group: 400 millimetres of titanium body with a 65 millimetre inlet and the hardware that connects it to the collector.
Key Features
- Force Evo silencer group for the Yamaha R6 and YZF-R6 Race, 2017 to 2026.
- Titanium, 400 mm, racing-style carbon end cap.
- 65 mm inlet, for Spark's STEP 3 collector.
- Supplied as a group, with the connecting hardware.
- Racing part, no homologation.
Sixty-Five, Not Sixty
This is the single most important line on the page. Spark builds R6 silencers at two inlet diameters: 60 mm and 65 mm. This one is 65. The Grid-O silencer GYA8867ST is 60. Five millimetres is invisible in a listing photograph and fatal at the workbench.
If the system on the bike is a STEP 3 titanium kit, 65 is what it wants. If you are not certain, measure the collector outlet or send us the system number before ordering.
Group Versus Spare Part
Spark sells the same case two ways, and the price list distinguishes them carefully. This article is the group — the body plus the connecting hardware, ready to bolt on. SGCM12400028T is the same 400 mm Force Evo case listed as a spare part, sixty-one euro less, without that hardware.
Order the group if the old silencer went down the road with its fittings attached. Order the spare part only if you still have the clamps, the bush and the bracket in front of you and know they are serviceable.
What the Evo Case Is
Ribs run back along the titanium body and converge towards a racing-style carbon end cap. The ribbing stiffens the sleeve, which lets Spark keep the wall thin, and the taper is what makes a Force Evo recognisable across a paddock.
In the full STEP 3 system this case is the one Spark rates at 102 dB — the configuration built to clear the limit most European circuits publish.
Fitment & Compatibility
Yamaha R6 and YZF-R6 Race, 2017 to 2026, on Spark's 65 mm STEP 3 systems. The complete system with this silencer is GYA8873T. The bare case as a spare part is SGCM12400028T. The 60 mm Grid-O silencer is GYA8867ST, and the STEP 3 collector with link is GYA8877.
Road Approval
None. Racing part, closed course only.
Specifications
- Part number: GYA8873ST
- Type: Silencer group
- Design: Force Evo
- Material: titanium, carbon end cap
- Length: 400 mm
- Inlet: 65 mm
- Road approval: none, track use
- Fitment: Yamaha R6 / YZF-R6 Race (2017-2026)
- Manufacturer: Spark Exhaust Technology, Mantova, Italy
| Part number | GYA8873ST |
|---|---|
| Type | Silencer |
| Silencer design | Force Evo |
| Material | Titanium |
| Spark weight | 4.2 kg |
| Standard weight | 10.3 kg |
| Weight saving | 6.1 kg |
| Dimensions | Ø 65 mm, 400 mm long |
| Fitment | Yamaha R6 / YZF-R6 RACE (2017-2022) |
| Road approval | None — track use only |
- Yamaha R6
- Yamaha YZF-R6 RACE
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// Spark Exhaust
Spark Exhaust Force Evo Silencer Group D.65 400 mm Titanium Yamaha R6 / YZF-R6 Race (2017-2026) GYA8873ST

Tech specs
- Part number
- GYA8873ST
- Type
- Silencer
- Silencer design
- Force Evo
- Material
- Titanium
- Spark weight
- 4.2 kg
- Standard weight
- 10.3 kg
- Weight saving
- 6.1 kg
- Dimensions
- Ø 65 mm, 400 mm long
- Fitment
- Yamaha R6 / YZF-R6 RACE (2017-2022)
- Road approval
- None — track use only
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
Frequently asked questions
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