dbr silentx vespa px 170 190ccDBR SilentX is the racing exhaust designed for Vespa PX 170cc 190cc engines, combining high performance with effective noise reduction thanks to the aluminum silencer. Made for those seeking optimized fluid dynamics and precise resonance, even in advanced street configurations. Unlike stamped industrial products, the DBR SilentX is built from P04 Steel with reduced thickness, using a fully hand peened welding technique that eliminates internal