Product Details
About this part
We designed the CTS Turbo B58 Midpipe Upgrade to improve exhaust flow, enhance performance, and bring out the signature B58 throaty sound. The factory midpipe is well resonated, so we developed a high-flow replacement that increases throttle response, sharpens turbo spool, and adds a deeper, more refined exhaust tone.
Built from T304 stainless steel and fully, our midpipe offers a direct bolt-on fit using all factory mounting points. It integrates seamlessly with OEM components, delivering noticeable gains in both sound and performance without introducing drone or unwanted resonance.
Whether your car is stock or tuned, our B58 Midpipe Upgrade is a must-have to unlock the full character of your F-series BMW.
Features
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T304 stainless steel construction for strength and corrosion resistance
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Direct bolt-on fitment using factory mounting points
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Enhanced exhaust tone without rasp or drone
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Improved turbo response and smoother power delivery
Fitment
BMW F-series B58 GEN1 Models:
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2016–2019 BMW 340i (F30/F31)
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2017–2020 BMW 440i (F32/F33/F36)
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2016–2019 BMW 340i xDrive (F30/F31)
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2017–2020 BMW 440i xDrive (F32/F33/F36)
Engine: B58 (GEN1 only)
Notes:
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Not compatible with B58TU (GEN2) engines found in later G-series models (e.g., G20 340i).
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Compatible with OEM and CTS Turbo downpipes.
Fitment
Not sure it fits? Contact us with your car's year, model and VIN and we'll help you confirm before you order.
If a part doesn't fit as expected, contact us and we'll work with you to resolve it.
Majority of products have a fitment section in the product description or within the title.
Returns
- Unused, uninstalled parts can be returned or exchanged within 30 days of the order date.
- To start a return: Contact us first, don't use Return to Sender.
- Returns can have up to a 20% restocking fee.
- Built-to-order and special-order items can't be returned or cancelled once production begins.
Shipping
- Orders are processed 7 days a week to ensure your product ships as quickly as possible.
- Inspect parts within 10 days of delivery, and reach out regarding any damage or missing pieces.
See our Tariff Policy
Warranty
- All parts retain the manufacturer's warranty.
- Warranty claims are subject to the manufacturer's approval.