4.5-Inch Stainless Steel Downpipe w/ High-Flow Cat

Introducing the VRSF Catted Downpipe, engineered to significantly reduce back pressure and enhance performance in your BMW B58-equipped vehicle. This upgrade is designed to replace the restrictive factory catalytic converter with a high-flow, 200-cell unit, resulting in faster turbo spool, increased power output, and a more aggressive exhaust note. Constructed from hand-crafted, TIG-welded 4.5-inch SS304 grade stainless steel, this downpipe features a CNC-machined flange for a smooth transition from the turbocharger to the mid-pipes. Its smooth radius bends are optimized to minimize turbulence and maximize flow. The downpipe is compatible with both the stock cat-back exhaust and most aftermarket cat-back systems. It is backed by a lifetime warranty for the downpipe itself, though the warranty on the catted downpipe is limited to two years. For optimal performance gains, a tune is recommended, with estimated increases of 25-30hp. Important Note: This product is not for sale or use in the state of California on any pollution-controlled vehicle, as per the California Air Resources Board (CARB) regulations.