B58 Downpipe 4.5''

BMW B58 4.5” Downpipe – High-Performance Turbo Exhaust Upgrade

 Unleash More Power, Faster Turbo Spool, and Aggressive Sound 

Upgrade your BMW B58 turbocharged engine with this 4.5-inch high-flow downpipe, designed to maximize exhaust flow, reduce backpressure, and enhance turbo efficiency. By eliminating the restrictive factory catalytic converter, this bolt-on upgrade provides faster turbo spool, improved throttle response, and increased horsepower, making it essential for tuned B58 builds.

 A must-have upgrade for stock and high-boost B58 engines!

 Key Features & Benefits:

 4.5-Inch Large Diameter for Maximum Flow – Allows higher exhaust velocity for better performance

 Eliminates Restrictive Factory Catalytic Converter – Frees up exhaust flow for more power and torque

 Made from High-Quality 304 Stainless Steel – Durable, rust-resistant, and heat-resistant construction

 Mandrel-Bent Tubing for Smooth Exhaust Flow – No restrictions, ensuring optimal performance

 Precision TIG Welded for Strength & Longevity – Built to handle high-boost applications

 Aggressive Exhaust Note – Enhances turbo spool and exhaust sound without excessive drone

 Direct Bolt-On Fitment – Easy installation with OEM-style fitment

 Designed to work with both OEM and aftermarket exhaust systems!

 Compatible BMW Models (B58 Engine)

 Fits the following BMW models equipped with the B58 3.0L Turbocharged Engine:

• BMW 140i (F20/F21) 2016-2019

• BMW 240i (F22/F23) 2017-2021

• BMW 340i / 340i xDrive (F30/F31) 2016-2019

• BMW 440i / 440i xDrive (F32/F33/F36) 2017-2020

• BMW 540i / 540i xDrive (G30/G31) 2017+

• BMW 740i / 740i xDrive (G11/G12) 2016+

• BMW X3 M40i (G01) 2018+

• BMW X4 M40i (G02) 2019+

• BMW Z4 M40i (G29) 2019+

• Toyota Supra (A90/A91) 2020+ (B58 Engine)

 Perfect for stock and upgraded turbo setups.

 Why Upgrade to a High-Flow Downpipe?

•  More Horsepower & Torque – Increases power output by removing exhaust restrictions

•  Reduces Turbo Lag & Improves Spool – Allows turbos to work more efficiently

•  Optimized for High-Boost & Tuned B58s – Supports stage 1, stage 2, and big turbo setups

•  Enhances Exhaust Sound – Adds an aggressive tone while reducing backpressure

•  Built for Long-Term Durability – High-quality stainless steel withstands extreme heat & pressure

 The factory downpipe on the B58 engine is one of the biggest restrictions in the exhaust system. Upgrading to a high-flow downpipe allows your turbo to spool faster, improving response and unlocking more power.

 Recommended Supporting Mods for Maximum Performance:

 ECU Tune (Bootmod3, MHD) to Optimize Airflow & Fueling (Required for catless downpipes)

 Upgraded Charge Pipes to Prevent Boost Leaks

 High-Flow Intake for Better Turbo Efficiency

 Front-Mount Intercooler (FMIC) to Reduce Intake Temps

 Aftermarket Exhaust for Maximum Flow & Sound Enhancements

 A tune is required to prevent a check engine light and maximize performance gains.

 Order Your BMW B58 4.5” Downpipe Today!

Upgrade your BMW B58 exhaust system with a high-flow 4.5” stainless steel downpipe, improving turbo efficiency, exhaust sound, and overall performance.

 In Stock & Ready to Ship!