4.5" Downpipe Exhaust for 2016+ BMW B58 F/G Series 3.0L F30 F34 M140i M240i 340i 440i 540i 740i
Brand New
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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 & DELIVERY
Fast Processing & Reliable Transit
- Processing: Orders are processed and shipped from the nearest warehouse within 24 hours.
- Delivery: Estimated delivery time is approximately 4 to 5 business days.
RETURNS & EXCHANGES
30-Day Hassle-Free Policy
- Return Window: We offer a 30-day return policy from the date of delivery.
- Process: To initiate a return or exchange, please contact our customer service team first to receive authorization and instructions.
WARRANTY
2-Year Limited Replacement Warranty
- Duration: All products are backed by a 2-year limited warranty.
- Coverage: This warranty covers manufacturing defects and product failures under normal use, and provides a replacement for qualified cases (repairs are not performed).
CUSTOMER SUPPORT
We’re Here to Help – Contact Us First
- Priority Contact: For any order-related issues—including returns, warranty claims, or general inquiries—please contact us first before taking further action. We are committed to resolving your concern promptly.
- Feedback Notice: If you are unsatisfied, we kindly ask that you allow us an opportunity to address the issue before leaving neutral or negative feedback.
- Email Support: You can reach us at support@SAMEXHAUST.com.
Attention
Products on this site are for off-road/racing use only and are not legal for public roads where emissions laws apply.
Professional installation recommended. Removing emissions equipment (DPF, CAT, SCR, DOC) requires deleting related sensors and a compatible tuner to avoid engine codes.
Performance gains may vary—no guarantees.
