Best exhaust for bmw r1250gs

The BMW R1250GS is a premium adventure bike which can be spec'd up with all the toys and is powered by a liquid cooled 1,254 cc Boxer engine with Variable Valve Timing (VVT), producing 134.1 bhp at 7,750 rpm and maximum torque at 6,250 rpm. Power makes its way to the rear wheel via shaft drive. Features include:

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