SIP ROAD XL Viper Box racing exhaust for Vespa 125 VNA-TS, 150 VBA-Sprint, PX80-150, PE/Lusso 24164300

SIP Road Viper Box High-Torque Exhaust System – for Large-Displacement Vespa Engines

Description

The SIP Road Viper Box exhaust system is designed to deliver high torque even at low revs, making it ideal for small, large-displacement Vespa engines. With the Viper Box for small crankcases, the SIP Road range is completed with four different exhaust systems, suitable for both 200 cc and 125–150 cc Vespa engines.

The Viper Box delivers its full potential on tuned engines, such as 177cc kits with long-stroke crankshafts and displacements between 181cc and 206cc. The result is powerful torque available very early and early peak power, ideal for touring engines.

Main features

• Large volume with tall box
• Long spiral-shaped collector
• High torque even at low revs
• Ideal for touring and large displacement engines
• Efficient and visually discreet SIP Road systems

Comparison with other SIP Road systems

The SIP Road 2 and SIP Road 3 systems offer high performance while maintaining an almost original look. Those looking for a more distinctive character can opt for the SIP Road XL or the Viper Box XL , both featuring a tall, bulky box.

While the XL prioritizes maximum power at high revs, the Viper Box, thanks to its long, spiral-shaped manifold, ensures very early torque availability. This feature is particularly appreciated on touring engines, allowing for relaxed gear changes and a smooth, comfortable ride.

Sensor and engine control preparation

The compact version of the Viper Box features welded attachments for:

• Exhaust Gas Temperature (EGT) Thermometer
• Lambda Probe / A/F Sensor

In combination with the SIP electronic tachometer, you can constantly monitor the engine's operating status, promptly identifying any anomalies. The lambda probe is also extremely useful for correct carburetor tuning.

Construction and assembly

As with racing exhaust systems, the Viper Box flange is supported by springs and sealed with a high-temperature FKM O-ring . This solution ensures precise fit and effective vibration isolation, improving comfort and durability.

Surface protection is provided by a high-quality paint finish, typical of all SIP Road systems. Viper speakers are produced in small series Made in Europe .

Conclusion

Powerful torque even at low revs, plug-and-play preparation for lambda probe, European handcrafted construction: the SIP Road Viper Box is the ideal choice for large-displacement Vespa engines oriented towards touring and performance.

Technical details

• Connector suitable for all standard cylinders Ø 37 mm
• FKM 36 x 2.5 mm O-ring included
• 20 hand-welded segments
• EGT connection: M5 x 0.8
• Lambda probe / A/F sensor connection: M18 x 1.5
• Complete with tension springs and fixing plate
• Wheel replacement possible without removing the muffler