B58 4.5-Inch SS304 Stainless Steel Downpipe

The VRSF B58 Downpipe is engineered to be the best "bang for the buck" modification for your B58-powered BMW or Toyota Supra. By replacing the restrictive factory catalytic converter with either a catless design or a high-flow 200-cell race cat, this downpipe significantly reduces back pressure. This reduction leads to faster turbo spool, increased horsepower and torque, and a more aggressive exhaust note. Constructed from durable SS304 grade stainless steel, the downpipe measures 4.5 inches in diameter and features hand-crafted, TIG-welded seams for longevity and performance. It includes a CNC-machined 304 stainless steel flange that ensures a smooth transition from the turbocharger to the mid-pipes, minimizing turbulence and maximizing flow. Smooth radius bends are incorporated throughout the design to further enhance exhaust gas velocity and efficiency. It is available for a wide range of BMW models including the 2019-2023 G20 M340i, G22 M440i, G26, 2019-2022 F22 M240i, 2021-2023 G42 M240i, 2019-2023 G05 X5 40i, and 2019-2023 G29 Z4 M40i. It also fits the 2020-2024 Toyota Supra A90. Gains of 25-30hp are expected with a tune. VRSF offers a lifetime warranty on this downpipe. However, please note that the warranty on the catted downpipe is limited to two years. Installation is described as straightforward with perfect fitment, though professional tuning is recommended to take full advantage of the performance gains.