SKU: 49429039368

4.5" Downpipe Exhaust for 2016+ BMW B58 F/G Series 3.0L F30 F34 M140i M240i 340i 440i 540i 740i

Sale price$128.70 Regular price$143.00
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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Description

4.5" Downpipe Exhaust for 2016+ BMW B58 F/G Series 3.0L F30 F34 M140i M240i 340i 440i 540i 740iUnlock the full potential of your BMW B58 engine with the SAMexhaust Downpipe. Designed for the F2X M140i, M240i, and F3X M340i, M440i Series, this high performance downpipe overcomes the restrictive factory design to significantly improve exhaust flow and turbo efficiency. Experience quicker turbo spool up, increased horsepower, and sharper throttle response. By optimizing exhaust gas evacuation, it delivers faster acceleration, enhanced turbo

Unlock the full potential of your BMW B58 engine with the SAMexhaust Downpipe. Designed for the F2X M140i, M240i, and F3X M340i, M440i Series, this high-performance downpipe overcomes the restrictive factory design to significantly improve exhaust flow and turbo efficiency. Experience quicker turbo spool-up, increased horsepower, and sharper throttle response. By optimizing exhaust gas evacuation, it delivers faster acceleration, enhanced turbo responsiveness, and a more engaging drive—transforming your B58 into an even more thrilling powerhouse.

Features

  • Made from hand crafted, tig welded 4.5″ 304 grade stainless steel
  • Fits RHD and LHD models with no modifications necessary
  • Smooth radius bends to decrease turbulence and increase flow
  • Gains from 25-30hp with tune
  • Improves Engine Output and Efficiency, Gives you extra HPs, and increases torque
  • Large diameter and free flow tubing for unrestricted flow, Making the exhaust air flow smooth, Designed for high-performance racing
  • All joints are TIG welded to prevent cracking and wear
  • CNC Machine Flange for MAX Strength and Durability
  • Flanges chrome plated for corrosion resistance

Fitment

  • 2016+ BMW M140i F20
  • 2016+ BMW M240i/M240i xDrive F22
  • 2016+ BMW 340i/340i xDrive F30/F31/G20
  • 2016+ BMW 440i/440i xDrive F32/F33/F36/G22/G23/G26
  • 2016+ BMW 540i/540i xDrive G30/G31
  • 2016+ BMW 740i/740i xDrive G11/G12
  • 2018+ BMW X3M40i (18-21)/X4 M40i(19-21) G01/G02

VEHICLE NAME YEAR ENGINE
BMW 340i 2017~2018 3.0L
BMW 340i xDrive 2017~2018 3.0L
BMW 440i 2017~2020 3.0L
BMW 440i xDrive 2017~2020 3.0L
BMW 540i 2017~2023 3.0L
BMW 540i xDrive 2017~2024 3.0L
BMW 740i 2017~2024 2.0L|3.0L
BMW 740i xDrive 2017~2022 3.0L
BMW M140i 2017~2019 3.0L
BMW M240i 2017~2021|2023~2024 3.0L
BMW M240i xDrive 2017~2024 3.0L
BMW X3 2018~2021 3.0L
BMW X4 2019~2021 3.0L
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 49429039368

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Matthew J Hughes
Grantham, US
★★★★★ 5
Fits well! XL is Real!
Color: (239) Elite Beige / Elite Beige / Halo Gray, Size: X-Large
As far as I know, these are the only XL no show tan socks on Amazon that actually fit a size 14 foot. I've tried a few other that don't fit after wearing them once. This is a regular feeling sock and not the thin hose type like other XL.
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Reviewed in the United States on April 21, 2026
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Randy Deasy
Charlottesville, US
★★★★★ 5
Not to thick or thin well made
Size: Medium, Color: (601) Bittersweet Pink / Stone / Stone
I bought pink so as not to lose when doing laundry with my daughter who steels all socks lol!
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Reviewed in the United States on May 8, 2026
S
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Stacey Cohick
Draper, US
★★★★★ 5
Perfect
Size: X-Large, Color: (601) Bittersweet Pink / Stone / Stone
They were perfect
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Reviewed in the United States on April 27, 2026
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Susan Brown
Phoenix, US
★★★★★ 5
Very Comfortable!
Size: Medium, Color: (601) Bittersweet Pink / Stone / Stone
Very comfortable. Don’t slip off back of heal. Love the colors.
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Reviewed in the United States on March 25, 2026
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C. V.
Omaha, US
★★★★★ 5
😊
Size: Medium, Color: (601) Bittersweet Pink / Stone / Stone
These are really nice except I don’t like all the colors of them so I’m getting different ones same company just different colors. I don’t like the thick ones these are perfect.. 🤩
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Reviewed in the United States on February 24, 2026

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