B58 Downpipe Upgrade 4.5 inch

Introducing the HPP MotorSports B58 High Flow Catless downpipe, designed to fit all Gen 1 and Gen 2 B58s (including Supra). Boasting a true 4.5 inch diameter throughout the downpipe until it meets the exhaust, this product is a top-of-the-line option for those looking for a high-flow downpipe. It can be easily bolted onto your OEM exhaust without the need for any modifications, or it can be cut and welded to a custom upgraded exhaust, with the addition of a larger diameter flex joint. With this downpipe, you can expect reduced backpressure and less stress on the turbo, which translates to improved performance. Notably, our downpipe maintains its consistent 4.5 inch diameter throughout, which sets it apart from other downpipes on the market.  **These Are For Decoration/Art Only. Installation On A Motor Vehicle Is Illegal In Most if Not All States And HPP Does Not Sell For Road Use** Fitment: ALL Bmw/Toyota B58 Equipped Models 2016-2023 340i / 440i / M 240i / M 340i  / M 440i / M 140 X3