In Northern California? Get this professionally set up & installed!
This federal EPA-compliant 400-cell catted downpipe gives your BMW B58 or Toyota GR Supra better exhaust flow, quicker turbo response and more sound without going catless. Valvetronic offers separate versions for Gen 1 and Gen 2 B58 engines or the newer Gen 3 B58, so you can get the correct downpipe for your engine.
The 400-cell catalyst is less restrictive than the factory unit, helping the turbo breathe better while adding a deeper exhaust note and more noticeable turbo sound. It works with the stock exhaust if you only want a smaller change in sound, or you can pair it with an aftermarket exhaust when you want to hear more of the B58.
Select Your B58 Generation
- Gen 1 & 2 B58: Fits compatible earlier F-chassis and G-chassis BMW models along with the Toyota GR Supra.
- Gen 3 B58: Fits compatible newer BMW models using the latest Gen 3 version of the B58 engine.
- Do not select the downpipe using the chassis or model name alone. BMW used different B58 generations within some of the same model lines.
- Check the engine generation, production date and existing downpipe before ordering.
Gen 1 & 2 B58 Fitment
- BMW 340i / 340i xDrive F30 and F31 (2016, 2017, 2018)
- BMW 440i / 440i xDrive F32, F33 and F36 (2017, 2018, 2019)
- BMW 540i G30 (2017, 2018, 2019, 2020, 2021, 2022, 2023)
- BMW M140i F20 and F21 (2017, 2018, 2019)
- BMW M240i / M240i xDrive F22 and F23 (2017, 2018, 2019)
- BMW M240i / M240i xDrive G42 (2022, 2023, 2024, 2025, 2026)
- BMW M340i G20 and G21 (2020, 2021, 2022, 2023, 2024)
- BMW M440i G22, G23 and G26 (2020, 2021, 2022, 2023, 2024)
- BMW X3 M40i G01 (2018, 2019, 2020, 2021, 2022, 2023, 2024)
- BMW X4 M40i G02 (2018, 2019, 2020, 2021, 2022, 2023, 2024)
- BMW X5 sDrive40i / xDrive40i G05 (2019, 2020, 2021, 2022)
- BMW X6 xDrive40i G06 (2020, 2021, 2022)
- BMW X7 xDrive40i G07 (2019, 2020, 2021, 2022)
- BMW Z4 M40i G29 (2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026)
- Toyota GR Supra A90 / A91 3.0L (2020, 2021, 2022, 2023, 2024, 2025, 2026)
Gen 3 B58 Fitment
- BMW M340i / M340i xDrive G20 (2025, 2026)
- BMW M440i / M440i xDrive G22 and G23 (2025, 2026)
- BMW M440i / M440i xDrive Gran Coupe G26 (2025, 2026)
- BMW 540i xDrive G60 (2024, 2025, 2026)
- BMW 740i / 740i xDrive G70 (2025, 2026)
- BMW X3 M50 / M50 xDrive G45 (2025, 2026)
- BMW X5 sDrive40i / xDrive40i G05 (2023, 2024, 2025, 2026)
- BMW X6 xDrive40i G06 (2023, 2024, 2025, 2026)
- BMW X7 xDrive40i G07 (2023, 2024, 2025, 2026)
Fitment Notes
- The Gen 1 and Gen 2 B58 engines share one downpipe option on this listing.
- The Gen 3 B58 uses a different downpipe and must use the Gen 3 option.
- Some model years appear in more than one B58 generation because BMW changed engines during the model's production run.
- Vehicle production dates and regional engine specifications can affect fitment.
- Professional installation is recommended.
Federal EPA Compliant
- Federal EPA-compliant 400-cell catalytic converter
- Designed for vehicles built and registered to Federal EPA emissions standards
- Maintains a catalytic converter while providing more exhaust flow than the factory downpipe
- Not CARB exempt and not legal for vehicles registered in California
- Valvetronic also excludes vehicles required to meet CARB standards in New York, Maine and Colorado
- This is not a 50-state-legal downpipe
- Check your state and local emissions requirements before ordering
Specs & Features
- 400-cell high-flow catalytic converter
- Brushed T304 stainless steel construction
- Mandrel-bent tubing with smooth internal transitions
- Reduces restriction compared to the factory downpipe
- Helps improve turbo response and midrange power delivery
- Adds a deeper exhaust tone and louder turbo sound
- Precision TIG-welded construction
- OEM-style oxygen sensor placement
- Direct bolt-on design using the factory mounting locations
- Designed for stock and tuned B58 applications
- Works with the factory exhaust or compatible aftermarket exhaust systems
Part Numbers
- Gen 1 & 2 B58: BMW.B58.FF.400C.BR
- Gen 3 B58: BMW.B58.GEN3.FF.400C.BR
Warranty
- Catalyst: 25,000-mile limited emissions and OBD-II compatibility warranty
- Catalytic converter shell and connecting pipes: Five-year or 50,000-mile limited warranty against defective welding and corrosion
- T304 stainless tubing and welds: Limited lifetime-of-ownership warranty against manufacturing defects and penetrating rust
- Warranty coverage applies to the original purchaser and is not transferable
Pairs Well With
- IRL Gen 2 B58 Charge Pipe – Replace the factory plastic charge pipe with an aluminum version on compatible Gen 2 M240i, M340i, M440i and GR Supra applications.
- MAD B58 High-Flow Air Intake – Add more intake and turbo sound to compatible M240i, M340i and M440i models while opening up the inlet side of the B58.
- AWE Exhaust for BMW M340i and M440i – Pair the catted downpipe with a full exhaust available in several sound levels. Check the exhaust listing for exact year and chassis fitment.
About Valvetronic Designs
Valvetronic Designs makes exhaust parts for people who want more sound and better flow without making the car a pain to drive every day. These B58 downpipes can be used with the stock exhaust or paired with a compatible aftermarket exhaust when you want a bigger change in sound.
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Ordering from Redline360
Redline360 is an Authorized Dealer so we only sell authentic and genuine parts and accessories.
Order updates, tracking and info
Our goal is your complete satisfaction. Upon ordering, you will receive an email confirmation of your order along with your invoice. You will be able to log into our website 24/7 to check on your order at any time. Your order is processed Monday through Friday from 8am to 6pm PST as soon as it is placed. Once your order ships, we will email you a tracking number so you can track your package.
Protect your purchase
Redline360 offers our customers piece of mind! We have partned with Extend to offer you Extend Product Protection and Extend Shipping Protection. Read about each protection that Extend offers to Redline360 customers!
Multiple distribution points ready to serve you!
We ship from multiple locations around the United States so you receive your part as quick as possible. Not every warehouse stocks all the same parts, so the closest warehouse to you that has the part in stock is where your order will ship from. We ship from California, Nevada, Indiana, Michigan, Florida, Texas and Pennsylvania.
Secure Ordering
We take security seriously! We are never exposed to your credit card information, and it's never stored. Credit card transactions go through the credit card processor directly. We also offer various other payment methods such as PayPal, Affirm Financing (Pay over time), Amazon Pay, Apple Pay and more!
Any non CARB compliant items can not ship California. We will notify you if we have to cancel your order.
Some products may be subject to local rules, laws and regulations in certain areas. Always check your local laws to determine legal restrictions. We are not responsible if you buy a product that is not legal in your area.
For items that have free shipping, free shipping only applies to the lower 48 states.
Questions? Contact us.
Actual item may vary from picture
Redline360 is an Authorized Dealer so we only sell authentic and genuine parts and accessories.
Order updates, tracking and info
Our goal is your complete satisfaction. Upon ordering, you will receive an email confirmation of your order along with your invoice. You will be able to log into our website 24/7 to check on your order at any time. Your order is processed Monday through Friday from 8am to 6pm PST as soon as it is placed. Once your order ships, we will email you a tracking number so you can track your package.
Protect your purchase
Redline360 offers our customers piece of mind! We have partned with Extend to offer you Extend Product Protection and Extend Shipping Protection. Read about each protection that Extend offers to Redline360 customers!
Multiple distribution points ready to serve you!
We ship from multiple locations around the United States so you receive your part as quick as possible. Not every warehouse stocks all the same parts, so the closest warehouse to you that has the part in stock is where your order will ship from. We ship from California, Nevada, Indiana, Michigan, Florida, Texas and Pennsylvania.
Secure Ordering
We take security seriously! We are never exposed to your credit card information, and it's never stored. Credit card transactions go through the credit card processor directly. We also offer various other payment methods such as PayPal, Affirm Financing (Pay over time), Amazon Pay, Apple Pay and more!
Any non CARB compliant items can not ship California. We will notify you if we have to cancel your order.
Some products may be subject to local rules, laws and regulations in certain areas. Always check your local laws to determine legal restrictions. We are not responsible if you buy a product that is not legal in your area.
For items that have free shipping, free shipping only applies to the lower 48 states.
Questions? Contact us.
Actual item may vary from picture