Spark Exhaust Exhaust Spring 83 mm Without Rubber Universal MOLLA01
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Eighty-three millimetres of exhaust spring, bare. The longer of Spark's two lengths, and the part that holds a slip joint together on almost every system it builds.
Key Features
- Exhaust spring, 83 mm.
- Supplied without a rubber sleeve.
- Spark part number MOLLA01, made in Mantova, Italy.
Why a Spring and Not a Clamp
An exhaust grows several millimetres between cold and working temperature. A rigid clamp fights that movement and puts it into the welds; a spring lets the joint slide and pulls it closed again.
That is why Spark uses sprung slip joints throughout its own systems, and why a fabricated exhaust built the same way outlives one welded solid.
Which Length
Eighty-three millimetres suits the longer span — a joint where the two hooks sit further apart, typically on larger-diameter pipework. Spark's shorter spring, MOLLA02, is 63 mm for tighter positions.
Measure between hook centres with the joint assembled and pick the spring that will be under tension rather than stretched to its limit.
Two Per Joint
Fitted at opposing sides. One spring lets the joint rock; three is no better than two and makes the assembly harder to separate. Two, opposite each other, is what Spark does.
Bare or Sleeved
This version comes without rubber. The sleeved equivalent, MOLLA06, costs a euro more and stops the spring ringing against the pipe at idle — worth having on a road machine and irrelevant on a track bike.
| Part number | MOLLA01 |
|---|---|
| Type | Clamp / spring |
| Material | Stainless steel |
| Fitment | Universal |
| Road approval | None — track use only |
| Length | 83 mm |
| Sleeve | None |
| Origin | Made in Italy |
| Manufacturer | Spark Exhaust Technology, Mantova |
| Manufacturer description | Spring 83mm without rubber |
Universal product — Please check whether it fits your bike.
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// Spark Exhaust
Spark Exhaust Exhaust Spring 83 mm Without Rubber Universal MOLLA01

Tech specs
- Part number
- MOLLA01
- Type
- Clamp / spring
- Material
- Stainless steel
- Fitment
- Universal
- Road approval
- None — track use only
- Length
- 83 mm
- Sleeve
- None
- Origin
- Made in Italy
- Manufacturer
- Spark Exhaust Technology, Mantova
- Manufacturer description
- Spring 83mm without rubber
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
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