aFe 49-36321-1 2.5" SS Exhaust System w/Cat & Resonator for 08-13 BMW M3 4.0L

This system is constructed of 2-1/2 IN 304 stainless steel tubing for maximum strength and durability. Includes dual high flow catalytic converters which are less restrictive than the factory converters providing maximum flow. Factory style laser cut flanges are used used for a secure leak-free seal. Utilizing factory style flanges this system is designed to fit in the stock locations with no cutting or modifications required for a hassle-free installation. 100% TIG-Welded for race-proven strength and durability.