Megan's axle back exhaust system is a good and easy way to add performance and looks to your BMW E46 M3. Designed as a direct bolt-on to replace the stock unit, this axle-back system works in conjunction with the OEM Mid-Pipe and is easy to install using clamps instead of heavy flanges to reduce weight in the exhaust system and ensure proper alignment and positioning of the exhaust. Constructed of T-304 Stainless Steel and polished to a mirror finish, this axle-Back system offers free-flowing performance over your OEM restrictive exhaust system and offering a sportier exhaust note. Being constructed of Stainless-Steel, this exhaust piece is much more lighter than your OEM system and offers increased Power:Weight ratio that plays an important role in the handling and performance of your vehicle. Specifications & Features: BMW E46 M3 2001-2006 -3" Quad Black Chrome tip design - 2.5" piping -Easy installation - No gaskets or hardware (bolts) included-- ABE connection uses a sliding flange on a flared pipe that accepts the original piping. The original bolts are reused. 4x M8x1.25x42mm nuts and bolts included for hangers. NOTE: Not 100% Black. Contains a slight rainbow effect. NOTE: (We also have miltiple variation muffler tips. Please check part number: #MR-ABE-BE46M30E NOTE: All Megan Racing Exhaust and Suspension products are deemed for "off-road use only"-- please check local laws regarding the modification of the exhaust systems by checking the vehicle code for your state. Many states are more stringent on exhaust modification laws and to pass SMOG. Please check your local laws.