3" Stainless Steel Cat-Back Exhaust System

The VRSF 3" Catback Exhaust is engineered as a cost-effective performance upgrade for the 2008-2012 BMW 135i and 135is models equipped with N54 and N55 engines. This larger diameter reduces back pressure, leading to faster turbo spool and enhanced power output. The system merges the two downpipe connections into a single 3" outlet, resulting in a significant weight reduction of over 30 lbs compared to the factory exhaust. The exhaust note is carefully tuned; at idle, it is subtle and only slightly louder than stock. However, when accelerating, it transforms into a deep, distinctive tone due to the single 3" primary muffler design. The tip design is fully adjustable and replaceable, offering customization options. VRSF backs this product with a "No Hassle" lifetime warranty. However, please note that the "Under Brace" must be removed to complete the installation. Some user reports indicate potential fitment issues with the mid-pipe muffler placement and heat shield interference.