Dinan 18-23 BMW M550i (G30) Free Flow Axleback Exhaust System - Polished Tips E60 M5 Fender Gains of +18 WHP and

Gains of +18 WHP and +30 lb-ft torque (with Active rear exhaust)

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Dinan 18-23 BMW M550i (G30) Free Flow Axleback Exhaust System - Polished Tips E60 M5 Fender Gains of +18 WHP andInternally, the exhaust is typical of other Dinan exhausts and is designed to improve exhaust flow by reducing back pressure, resulting in increased power output and a great sporty sound that is civilized when you want it to be, and pleasantly aggressive under hard acceleration. This is partly courtesy of the retained computer controlled exhaust valves that limit noise during low speed driving and open fully during high load conditions to allow free