BMW 5 Series 540i B58 G30/G31 Turbo Downpipe | High-Flow Catted Sports Cat or Catless Decat Front Pipe | 3.5in 88.9mm Stainless Performance Exhaust | Primary/Pre-Cat Replacement | Stage 2 | Cobra Sport

BMW 540i B58 Turbo Downpipe Upgrade - High-Flow Sports Cat or Catless Race Pipe

Unlock the soundtrack and flow your 3.0 turbo straight six deserves with this premium turbo downpipe upgrade for the BMW 540i B58. Choose either a high-flow sports catalyst or a catless race option to maximise performance potential, reduce restriction and add a deeper, more aggressive tone. This front pipe replaces the factory primary converter from the turbocharger outlet to the centre section, using large 3.5 inch 88.9 mm pipework for serious gains in gas velocity and response.

Engineered by Cobra Sport, this is a direct-fit front section designed for enthusiasts who want a quality upgrade for their BMW 5 Series 540i without compromise. We have fitted this setup for customers and feedback has been excellent on sound quality, fitment and finish.

Why choose this BMW 540i B58 front pipe

• Turbo downpipe for BMW 540i B58 3.0 petrol - a proven upgrade for flow and sound
• Available as high-flow sports catalyst or catless race pipe
• Large 3.5 inch 88.9 mm tubing for reduced back pressure and faster gas flow
• Fits from the turbo to the centre section - replaces the factory catalytic converter
• Improved six cylinder tone, crisper throttle response and enhanced driving experience
• Direct replacement front pipe with all relevant fittings and gaskets supplied
• Cobra Sport build quality for durability and consistent fit

Search-friendly fitment and use

Ideal for drivers searching for: BMW 540i B58 turbo downpipe, BMW 5 Series 540i exhaust upgrade, high flow cat for 540i, decat front pipe for BMW 540i, G30/G31 540i performance parts, BMW 540i tuning parts UK, primary cat replacement, pre-cat pipe, front section exhaust. Suitable for the 3.0 turbo B58-powered 540i models.

Options explained

• Sports catalyst - high-flow converter designed to free up exhaust flow and enhance sound while retaining a catalyst element. Replaces factory emissions devices and is not EC homologated. This may not meet current emission laws for road use in your territory.
• Catless race pipe - de-cat version sold for motorsport and off road use only worldwide.

What you get

• BMW 540i B58 turbo front pipe in 3.5 inch 88.9 mm pipework
• Choice of sports catalyst or de-cat configuration
• All relevant fittings and gaskets included for installation

Professional fitting

We recommend professional installation. Book fitting with MJ Modifications in Warwickshire - request a quote at info@mjmodifications.co.uk.

Important usage notes

• Sports catalyst version replaces factory emissions devices and is not EC homologated. This may not meet current emission laws for road use in your territory.
• The de-cat version is sold for motorsport and off road use only worldwide.

Media

Developed on the track. Released for the road. Motorsport-proven exhaust technology.