AWE 19-23 BMW 330i / 21-23 BMW 430i Base G2X Touring Axle Back Exhaust - Chrome SilverBeginning after the secondary catalyst, the Touring Edition picks up right before the rear axle and provides a full single 3 route from this point and splits to dual patented drone canceling 180 Technology resonators, followed by 3 tip outlets. Given the straight through design and lack of packing material, the 180 Technology resonators job is to defeat drone prone frequencies that would otherwise be experienced within the cabin. Maximum flow is