Spark Exhaust Stainless Steel Tube Ø 45 × 1.0 mm 500 mm Universal G9002
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Forty-five millimetres of straight AISI 304. Large enough to carry a big twin on its own, and one of only two diameters Spark bends through a full 180 degrees.
Key Features
- Straight exhaust tube, AISI 304 stainless steel.
- Ø 45 mm outside, 1.0 mm wall thickness.
- 500 mm long.
- One of the two sizes Spark also offers as a 180° bend.
- Spark part number G9002, made in Mantova, Italy.
Where the U-Bend Comes In
Spark bends only two diameters through 180 degrees: this one and fifty. Both are sizes used in underseat routing and in tight two-into-one work, where the pipe has to double back on itself in a space no bender can reach.
If your design has a U in it, check that it is at 45 or 50 before you commit — making one at any other diameter means two 90° bends and a weld in the middle.
Sizing to the Engine
Forty-five suits a large parallel twin, a V-twin of eight hundred to a thousand, or the front section of a four before the collector. It is on the generous side for anything smaller: gas speed falls, and with it the low-rev pull that makes a road bike pleasant.
Buying Bends Instead
Spark offers this diameter as a ready-made 30°, 45°, 90° and 180° bend. On a fabricated system the usual approach is straight stock for the runs and factory bends for the corners — the bends are mandrel-formed, hold their section and cost less than the tooling to make one.
Storing It
Cap both ends and keep it dry. Stainless does not rust from clean air, but a tube left open in a workshop collects grinding dust, and embedded steel particles are what starts the orange spots people blame on the material.
How Much to Buy
A one-off system almost always consumes more tube than the drawing suggests. Mitred joints waste material, a bend that comes out at the wrong angle is scrap, and every slip joint needs an overlap. Two lengths where the design says one is not extravagance — it is the difference between finishing a build in a weekend and waiting for a delivery.
Ordering
Supplied as one 500 mm length. Nothing is cut to size.
| Part number | G9002 |
|---|---|
| Type | Bent pipe |
| Material | AISI 304 stainless steel |
| Spark weight | 0.2 kg |
| Dimensions | Ø 45 × 1.0 mm, 500 mm long |
| Fitment | Universal |
| Road approval | None — track use only |
| Origin | Made in Italy |
| Manufacturer | Spark Exhaust Technology, Mantova |
| Manufacturer description | Tube l.500mm - d.45 x 1,0mm |
Universal product — Please check whether it fits your bike.
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// Spark Exhaust
Spark Exhaust Stainless Steel Tube Ø 45 × 1.0 mm 500 mm Universal G9002

Tech specs
- Part number
- G9002
- Type
- Bent pipe
- Material
- AISI 304 stainless steel
- Spark weight
- 0.2 kg
- Dimensions
- Ø 45 × 1.0 mm, 500 mm long
- Fitment
- Universal
- Road approval
- None — track use only
- Origin
- Made in Italy
- Manufacturer
- Spark Exhaust Technology, Mantova
- Manufacturer description
- Tube l.500mm - d.45 x 1,0mm
- 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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