After releasing exhaust systems for the Speed Twin, Bobber, Speedmaster and Thruxton it was only a logical step to develop an exhaust system for the Bonneville T120. This modern classic fits perfectly to Dr. Jekill & Mr. Hyde's philosophy. Be the silent gentleman in the Dr. Jekill mode and let your Bonneville T120 be heard when you switch on Mr. Hyde. Never too loud, but a deep and distinguished rumble will be the harbinger of your arrival. Pre-order now!