Vespa PX125 PX150 Sprint GT GTR BGM Pro BigBox SPORT Exhaust

This product is now discontinued, and has been superceded by the V2 version - click here

Vespa PX125 PX150 Sprint GT GTR BGM Pro BigBox SPORT Exhaust

The BGM BigBox Sport - a wolf in sheep's clothing
Performance like a racing exhaust - design and sound like a standard exhaust.

The BGM BigBox Sport is a purebred Vespa racing exhaust with the unsuspicious design of a genuine exhaust. Like the genuine Vespa exhaust, the BigBox is also double-walled and provided with insulation wool. This exhaust is an alternative to conspicuous and mostly loud replicas of our Original-BigBox and big expansion exhausts. Its high performance makes the bgm BigBox Sport clearly stand out from other box pipes. Designed for performance oriented drivers, who hold an unsuspicious vehicle in high esteem.

Like every racing exhaust, the Sport Box requires a high power engine in order to develop full performance. If used in combination with cylinders like Quattrini M1X and similar, this exhaust offers impressing results. It easily supports engine performances above the 25HP level and pushes with a rich torque. Despite its high top performance the sport box also supports leisure riding.

Due to the commitment to a high gas flow rate, BigBox Sport is not suitable for standard engines or tame tuning cylinders. It needs a clear and strong pressure impulse in order to breathe life into the big manifold of the Sport Box.

PROS:

• Standard design
• Low noise levels thanks to the double-wall and insulation wall like in genuine exhaust
• Top performance like an expansion exhaust
• No flat spot
• Broad revs range
• Higher top speed
• Very unsuspicious
• Fits also Rally/Sprint without modifications
• Solid design with clamp at the cylinder
• Handmade in Europe

CONS:

• Not suitable for vehicles with 8 inch wheels (no sufficient ground clearance)
• Not suitable for standard engines

Please note: use a main jet approx. 4-6 numbers bigger than the main jet used with the genuine exhaust.
To fasten the exhaust manifold to the cylinder you need to use a clamp. In comparison with a loose fitting with an O-ring, this ensures more stability and prevents damages at the exhaust flange. For best ground clearance we recommend to use a long spacer at the rear shock absorber.

Conclusion: pure understatement. Performance of a racing exhaust, design and sound like a standard exhaust.