AWE Tuning G2X Track Axle Back Exhaust | BMW 330i/430i (19-23,21-24) (3020-32429)Beginning after the secondary catalyst, the Track Edition picks up right before the rear axle and provides a full single 3" route from this point and splits to dual 3" tip outlets. The Track Edition has absolutely zero filter, making its sole purpose to increase the volume out of the B48 engine while remaining completely 50 state emissions compliant. A simple cut at the factory cut point is all it takes, and the Track Edition goes into place via four