Stone Exhaust Decat/Catless Downpipe (Race Front Pipe) for BMW 5 Series F10/F11 520i 528i N20/N26 2.0T 2010-2017 - High-Flow Turbo Outlet Test Pipe, Cat Delete, Stage 2 Upgrade, xDrive Compatible - Part A206NP

Stone Exhaust Race Front Pipe for BMW 5 Series F10 F11 520i 528i N20 N26

Unlock sharper response and a harder-hitting soundtrack on your BMW petrol turbo with the Stone Exhaust de-cat front section. Built for the 2.0 turbocharged N20 and N26 engines, this straight-through turbo outlet replaces the primary catalyst to cut restriction, speed up gas flow and bring the boost in earlier. The result is crisper throttle, stronger mid-range and a deep, motorsport-style tone, all with factory-style fit to your original system.

We run this part on our own builds and have fitted it for many customers. Feedback is consistently positive: excellent fit, tidy welds, no drama on installation and a noticeable improvement in response and sound quality.

Key reasons to choose this performance front pipe

• Purpose-built for BMW 520i and 528i with N20 or N26 turbo engines
• Low-restriction race pipe for faster turbo spool and livelier acceleration
• Flexi joint relieves stress from heat cycles and movement
• Multi-pass welds at the turbine flange for strength under extreme temperatures
• Single-piece design for a smooth internal bore and maximum flow
• Robot-assisted welding that keeps the inside of the tube clean and smooth
• 3D-scanned OE geometry and precise mandrel bends for exact routing and clearance
• Direct bolt-on to the factory exhaust for a straightforward install

Engineered to perform

Stone Exhaust digitises the original hardware and models gas speed and pressure to optimise tube diameter, bend angles and routing on the N20/N26 platform. The one-piece, 7-axis mandrel-bent construction keeps roundness through the curves to minimise turbulence, while robot-controlled welds and overlapping passes at critical flanges deliver durability where it matters. The integrated flex section helps protect the assembly from fatigue induced by heat and vibration.

Vehicle compatibility

For BMW 5 Series F10/F11 2.0 petrol turbo models, including xDrive where applicable:

• F10 520i, 528i pre-LCI (2010 to 2013)
• F10 520i, 528i LCI (2012 to 2016)
• F11 520i, 528i pre-LCI (2012 to 2013)
• F11 520i, 528i LCI (2013 to 2017)

Part number

A206NP

Warranty

Backed by a Stone Exhaust 2-year warranty.

Professional installation

Want it fitted properly the first time? Book your installation with MJ Modifications in Warwickshire. For a fitting quote, email info@mjmodifications.co.uk.

Usage notice

This race part removes the primary catalyst and is intended for off-road or track use where permitted. It is not suitable for road use, may affect MOT and emissions compliance, and should be used in accordance with local regulations.

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