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B58 Downpipe - BMW M240i M340i M440i 540i 840i X3 M40i X4 M40i X5 40i X6 40i | 4.5" & 5" Options

B58 Downpipe - BMW M240i M340i M440i 540i 840i X3 M40i X4 M40i X5 40i X6 40i | 4.5" & 5" Options

SKU: P9-B58DP-G2-45-CL-BF

$329.99
$329.99 $400.00
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Key Features

  • 304 Stainless Steel Material: Constructed from durable 304 stainless steel for strong resistance to heat, corrosion, and long term exhaust system reliability.
  • Fitment Tested Design: Each unit is supplied after fitment verification to ensure consistent compatibility with the intended vehicles.
  • OEM Mounting Compatibility: Engineered to utilize original mounting positions where possible for stable and secure installation.
  • Warranty Coverage: Backed by a 1 Year Free Warranty to provide confidence in quality and reliability.

Description


  • Optimized Exhaust Flow: Designed to reduce exhaust restriction and improve overall engine breathing, supporting smoother power delivery and improved throttle response.
  • 4.5" Diameter Option: Balanced performance with easier installation and reduced drone, making it suitable for daily driven performance builds.
  • 5" Diameter Option: Maximum exhaust flow for high horsepower builds, helping support engines with higher power output and increased boost levels.
  • Track Downpipe (Catless) and 200-Cell High Flow Option: The track Downpipe (Catless) is designed for maximum exhaust flow and motorsport use, while the optional 200-cell high flow catted version offers improved exhaust efficiency with a performance-oriented catalytic solution.
  • Professional installation is recommended to ensure proper alignment and secure mounting.

    • Designed for off-road and track use only. Not intended for use on public roads where emissions regulations apply.

COMPATIBILITY

Year Make Model Note
2022 - Present BMW G42 M240i Gen 2
2020 - 2024 BMW G20 M340i Gen 2
2025 - Present BMW G20 M340i Gen 3
2021 - 2024 BMW G22 M440i Gen 2
2021 - 2024 BMW G23 M440i Convertible Gen 2
2021 - 2024 BMW G26 M440i Gran Coupe Gen 2
2025 - Present BMW G22 M440i Gen 3
2025 - Present BMW G23 M440i Convertible Gen 3
2025 - Present BMW G26 M440i Gran Coupe Gen 3
2020 - 2023 BMW G30 540i Gen 2
2024 - Present BMW G60 540i Gen 3
2020 - Present BMW G14 840i Gen 2
2020 - Present BMW G15 840i Gen 2
2020 - Present BMW G16 840i Gran Coupe Gen 2
2020 - 2024 BMW G01 X3 M40i Gen 2
2020 - 2024 BMW G02 X4 M40i Gen 2
2019 - 2023 BMW G05 X5 xDrive40i Gen 2
2024 - Present BMW G05 X5 xDrive40i Gen 3
2020 - 2023 BMW G06 X6 xDrive40i Gen 2
2024 - Present BMW G06 X6 xDrive40i Gen 3
2020 - Present Toyota A90 GR Supra 3.0 Gen 2
2020 - Present Toyota A91 GR Supra 3.0 Gen 2

INCLUDED ITEMS

  • B58 Downpipe x 1
  • Necessary installation hardware x 1

INSTALLATION RECOMMENDATION

FOR BEST RESULTS, WE RECOMMEND PROFESSIONAL INSTALLATION TO HELP ACHIEVE PRECISE ALIGNMENT AND A CLEAN, SECURE FIT.

Guaranteed Fitment

Guaranteed Fitment

Precision-engineered specifically for BMW models. Fitment guarantee applies with professional installation

Responsive Customer Support

Responsive Customer Support

Our support team is available Monday–Friday, 9:00 AM–5:00 PM (PST). Contact us anytime at support@project9motorsport.com

Secure & Trusted Checkout

Secure & Trusted Checkout

Checkout is fully encrypted and PCI-compliant. We accept major credit cards, Apple Pay, Affirm, and more.

Manufacturer Warranty Included

Manufacturer Warranty Included

Every product includes a manufacturer warranty for added confidence and peace of mind.

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