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I have Meistershaft GTC full 3.5" exhaust and Fabworx 3.5" downpipes, Its loud with the valves open and stock like with them closed, its the best of both worlds,I get tons of compliments on how it sounds while driving around.
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2015 M6 Gran Coupe> DME stage 3 tune back end flash>JB4 with Methanol control>Fabworx Catless downpipes>Full Meistershaft GTC exhaust 102mm GB tips>Built motor with Forged Cp Carillo Rods and Pistons > SSP spec X clutch > Stage 1 Pure Turbos>PG front mount intakes>PG charge coolers>Vorsteiner front and rear Carbon diffuser>Auto Tecknic Carbon shift paddles>3D Design aluminum pedals
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