B58 Exhaust 4.5in DownPipe w/ Heatshied - BMW M340i B58 G20 G29 Supra A90 B58 2018-2023

Unlock the full potential of your B58 engine with our High-Performance Exhaust Downpipe with Integrated Heat Shield, engineered to deliver massive gains in power, sound, and turbo efficiency. Designed as a direct bolt-on upgrade for B58-equipped vehicles, this downpipe significantly reduces backpressure, allowing your turbocharger to spool faster and breathe freely.

Precision-built for enthusiasts who demand performance without compromise, this downpipe features a high-flow design and a custom-fitted heat shield to protect surrounding components from radiant heat.

Key Features:

• High-Flow Design
  Increases exhaust gas flow by reducing restrictions, resulting in improved turbo spool, throttle response, and horsepower gains.

• 304 Stainless Steel Construction
  Built from premium T304 stainless steel for long-term durability and corrosion resistance under high temperatures and harsh conditions.

• Integrated Heat Shield
  Professionally fabricated heat shield protects engine bay components and reduces heat soak, ideal for daily drivers and track builds alike.

• CNC Machined Flanges
  Ensures a perfect, leak-free fit with factory or aftermarket turbochargers and midpipes.

• Mandrel-Bent Tubing
  Smooth, precision bends eliminate flow disruptions and turbulence for optimal performance.

• Factory Fitment & Easy Installation
  Direct bolt-on replacement with no cutting or welding required. Retains use of OEM mounting points and O2 sensor locations.

• Optional 200 Cell High-Flow Catalytic Converter or Catless Configuration
  Choose between catted (emissions-friendly) or catless (track use) options based on your performance goals.

• TIG-Welded for Strength & Aesthetics
  Clean, strong welds ensure durability while giving a race-ready appearance.

Performance Gains:

• +15–25 HP (stock tune)

• +40+ HP (with tune)

• Noticeable reduction in turbo lag

• Enhanced exhaust sound and turbo spool

Vehicle Compatibility:

• 2018–2023 BMW M340i (G20) – B58 3.0L Turbo I6

• 2019–2023 BMW Z4 M40i (G29) – B58 3.0L Turbo I6

• 2020–2023 Toyota GR Supra 3.0 (A90/A91) – B58 3.0L Turbo I6