Spark Exhaust Lambda Sensor Thread Reducer M18 to M12 Stainless Universal SGATT260
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An M18 boss and an M12 sensor. Eight euro of stainless steel makes them meet.
Key Features
- Thread adapter, M18 external to M12 internal, for lambda sensors.
- Stainless steel.
- Sealing washer ROND18X24R is a separate article.
- Spark part number SGATT260, made in Mantova, Italy.
The Mismatch It Solves
Exhaust bosses are usually cut to M18, which is what most factory sensors use. Wideband sensors and some aftermarket units are M12, and a system built to one standard does not accept the other.
Rather than cutting the boss out and welding a new one in, this adapter threads into what is already there.
Where the Sensor Ends Up
Slightly further out of the gas stream than it would be in a native boss. For a narrowband sensor reading a mixture that is nothing subtle, that is fine. For accurate wideband work, it is worth knowing the tip is no longer where the manufacturer assumed.
Stainless, Not Brass
Unlike Spark's plugs, this part carries a sensor and has to hold its thread precisely. Stainless keeps the thread form; brass would not survive being removed and refitted at every service.
Ordering
One per boss, plus the copper washer ROND18X24R.
| Part number | SGATT260 |
|---|---|
| Type | Lambda plug |
| Material | Stainless steel |
| Dimensions | M18 thread |
| Fitment | Universal |
| Road approval | None — track use only |
| Thread | M18 external, M12 internal |
| Origin | Made in Italy |
| Manufacturer | Spark Exhaust Technology, Mantova |
| Manufacturer description | Plug - lambda reducer M18>M12 |
Universal product — Please check whether it fits your bike.
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// Spark Exhaust
Spark Exhaust Lambda Sensor Thread Reducer M18 to M12 Stainless Universal SGATT260

Tech specs
- Part number
- SGATT260
- Type
- Lambda plug
- Material
- Stainless steel
- Dimensions
- M18 thread
- Fitment
- Universal
- Road approval
- None — track use only
- Thread
- M18 external, M12 internal
- Origin
- Made in Italy
- Manufacturer
- Spark Exhaust Technology, Mantova
- Manufacturer description
- Plug - lambda reducer M18>M12
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
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