BMW 3 Series Performance Exhaust - Akrapovic - DownPipe - SS w/ Cat - `16-`17 is a direct-fit stainless steel downpipe with an integrated catalytic converter for 2016–2017 BMW 340i (F30/F31). This Akrapovic unit replaces the factory downpipe to reduce restriction and produce a more pronounced exhaust character while maintaining a catalytic element.

Made by Akrapovic to OE-style fitment standards, this downpipe is constructed from stainless steel with precision welds and mandrel-bent tubing for consistent internal diameter. It retains provisions for factory O2 sensors and bolts to existing flanges for a straightforward installation. The included catalytic section helps address emissions considerations where applicable, but purchasers should verify local regulations before installation. This part is aimed at enthusiasts seeking improved exhaust flow and a stronger, sportier tone without removing the catalytic element.

Features

• Direct-fit for 2016–2017 BMW 340i (F30/F31)
• Stainless steel construction with mandrel bends
• Integrated catalytic converter (w/ Cat)
• Retains factory O2 sensor ports and OEM-style flanges
• Manufactured by Akrapovic for consistent fit and finish

If you have questions or want help confirming fitment, please call us directly — we're happy to advise: 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations offering installation and customization services: Austin, Texas and the Los Angeles, California area. If you are considering purchasing multiple items, contact us for shipping discounts. We install on premises at both locations and can schedule a fitting or discuss any modifications you may need.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov