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- Vespa Classic
- Exhaust - EGIG PERFORMANCE Cobra S Ø=37mm (54-62mm stud spacing), bolted-on rear silencer - Vespa ET3, PV125
Fits: Vespa PV125 and ET3 125 with high-performance small-frame tuned engines ranging from 135 to 180 cm³.
The EGIG PERFORMANCE Cobra S is the logical evolution of the proven Cobra Evo. The resonant exhaust system was developed for high-performance Vespa small-frame engines with a displacement of 135–180 cm³ and combines higher peak power with the already familiar high torque levels.
At the same time, EGIG has managed to reduce noise levels. As a result, the Cobra S delivers more power with a more pleasant sound—without sacrificing the high-revving character of its predecessor.
The Cobra Evo was already known for its high peak power and broad resonance band. With the Cobra S, EGIG has further optimized the design: According to the manufacturer, the new version delivers more power while maintaining the same torque and operates more quietly.
The system is designed for high-performance engine setups with a correspondingly machined cylinder and a high-performance intake system. The Cobra S really shines in high-revving small-frame setups.
| Feature | Value |
|---|---|
| Manufacturer | EGIG PERFORMANCE |
| Model | Cobra S |
| Type | Resonance exhaust |
| Recommended Displacement | 135–180 cm³ |
| Exhaust manifold connection | Ø37 mm |
| Stud spacing | 54–62 mm |
| Muffler | Ø70 mm, bolted |
| Previous model | Cobra Evo |
For optimal power delivery, EGIG recommends the following valve timing based on the exhaust geometry:
| Exhaust configuration | Overflow / Exhaust |
|---|---|
| Exhaust with center rib | 126–128° / 190° |
| Exhaust with boosters | 126–128° / 196° Main outlet |
| One-piece outlet | 126–128° / 194° |
For cylinders with booster exhausts: Valve timing of 180–182° is recommended for the secondary exhausts.
The values listed are intended as a guide for tuning. The actual power band depends not only on the cylinder valve timing but also on displacement, the intake system, and the overall engine configuration.
The Cobra S features a manifold connection with a diameter of 37 mm and is designed for exhaust stud spacing of 54–62 mm. The bolted-on rear silencer with a diameter of 70 mm facilitates removal for maintenance work.
As a performance-oriented resonance exhaust system, the Cobra S requires a correspondingly tuned engine. In particular, carburetor jet settings, ignition timing, and gear ratios should be adjusted to match the engine’s power characteristics.
A suitable tuning cylinder with a matching exhaust port and sufficient space for the exhaust system is required.
