Akrapovic Catted Downpipe / Sports Cat Front Pipe for BMW 4 Series 440i B58 (F32 F33) 2016-2017 - Stainless Steel High-Flow Turbo Downpipe - ECE Approved Road Legal - Evolution Line Compatible

Performance Sports Catalyst Front Pipe for BMW 440i F32 F33 2016 to 2017

Unlock stronger mid‑range pull, faster spool and a richer soundtrack on your 4 Series 440i with this premium Akrapovic catalysed turbo front pipe. Purpose built for the B58B30 engine in the F32 coupe and F33 convertible, it replaces the restrictive factory section with a free‑flowing, stainless construction and a high efficiency sports catalytic converter that keeps things road legal under ECE type approval when used within the complete Akrapovic system.

Expect crisper throttle response, a deeper, more purposeful tone and refined cabin manners with no unwanted drone. Precision fitment means a straightforward swap for the OE part, delivering a true bolt‑on performance upgrade that enhances drivability every day and brings the best out of your BMW on spirited drives.

Why choose this sports cat front pipe

• Engineered for BMW 440i F32 and F33 2016 to 2017 with the B58 engine
• Free‑flow design increases exhaust gas velocity for improved performance and responsiveness
• Stainless steel construction for durability and long‑lasting corrosion resistance
• Sports catalytic converter with ECE type approval when installed as part of the Akrapovic Evolution stainless system
• Enhanced exhaust character with a richer, motorsport‑inspired note and no cabin drone
• No software calibration required for ECE compliance when paired with the approved system
• Direct replacement fit for the factory front pipe

Perfect partner for the Evolution stainless system

This catalysed front pipe is designed to work harmoniously with Akrapovic’s Evolution stainless cat‑back, creating a complete performance exhaust from turbo outlet to tailpipes. For reference, the compatible Evolution stainless systems include:

• BMW M140i: Evolution Line (SS) - MTP-BM/SS/3H + E-BM/SS/3
• BMW M240i: Evolution Line (SS) - MTP-BM/SS/4H + E-BM/SS/3
• BMW 340i and 440i: Evolution Line (SS) - MTP-BM/SS/2H + E-BM/SS/2

Proven on customer cars

We have fitted this upgrade for multiple BMW 440i owners and feedback has been consistently positive. Customers report a noticeably sharper response, stronger pull through the rev range and a more mature soundtrack that stays civil on the motorway and comes alive under load.

Installation and support

Professional installation recommended. Book fitting with MJ Modifications in Warwickshire or request a quote at info@mjmodifications.co.uk.

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