Osprey BMW B58 5-inch Catless Downpipe / De-Cat Front Pipe, Turbo Outlet Bellmouth, 4-inch Flex, 80mm OEM-Fit - High-Flow Stainless Cat Delete Exhaust Upgrade for M140i M240i 340i 440i 540i

Osprey BMW B58 5 inch Turbo De-Cat Front Pipe

Transform the way your B58 breathes with Osprey’s oversized turbo outlet front section. This race-spec de-cat pipe removes the catalyst for an open, free-flowing path, delivering serious gains in response and flow while retaining a simple bolt-on connection to the factory system. If you want instant spool, stronger mid-range and a harder-hitting top end on your B58-powered BMW, this is the upgrade that lets the turbocharger work at its best.

The large 5 inch bellmouth tapers into a robust 4 inch flex section and finishes with an 80 mm tail to join the stock exhaust. Built in stainless steel for durability, it provides a direct connection to OEM points for an easy install and a precise fit. Expect a crisper throttle, reduced back pressure and an aggressive motorsport tone when paired with a remapped setup or other performance hardware.

Why enthusiasts choose this Osprey de-cat front section

• Oversized 5 inch turbo outlet for maximum gas velocity and reduced restriction
• No catalyst for the most direct, free-flowing exhaust path
• Stainless steel construction for strength and longevity
• 4 inch flex section for reliability under heat and load
• 80 mm tail for seamless connection to the factory cat-back
• Bolt-on fitment using OEM mounting points for B58 applications
• Optimised for tuned B58 builds seeking lower back pressure and sharper response

Real-world confidence

We run this Osprey hardware on our own B58 projects and customer cars. Fitment is spot on, the quality is excellent and feedback on sound and performance has been consistently positive.

Professional fitting

Want it installed properly the first time? Book fitting with MJ Modifications in Warwickshire. Request a quote via info@mjmodifications.co.uk.

Important usage note

This is a de-cat front pipe intended for off-road and track use only where permitted. Always check local regulations before purchase and installation.

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