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Stone Exhaust

Stone Exhaust Decat Downpipe for BMW 5 Series F10/F11 520i 528i N20 N20B20 2.0T - High Flow Catless Turbo Outlet/Front Pipe Race Pipe (2010-2017) A206P

Stone Exhaust Decat Downpipe for BMW 5 Series F10/F11 520i 528i N20 N20B20 2.0T - High Flow Catless Turbo Outlet/Front Pipe Race Pipe (2010-2017) A206P

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Stone Exhaust High Flow Turbo Outlet Pipe for BMW F10 F11 520i 528i N20B20 - Part A206P

Unlock sharper response and a stronger soundtrack from your turbocharged four cylinder 5 Series with this free flowing front pipe from Stone Exhaust. Purpose built for the N20B20 engine in the F10 saloon and F11 touring, it reduces restriction, aids quicker spool and delivers a more engaging drive without compromising fit or finish.

At MJ Modifications we have installed this A206P system on customer cars and our own demonstrators. Fit is precise, the quality of the bends and welds is excellent and feedback has been consistently positive on drivability, throttle feel and tone.

Why this performance front section stands out

  • Straight through de-cat design for maximum gas velocity and reduced turbine back pressure
  • One piece construction for smooth internal flow and fewer potential leak points
  • Integrated flex bellow to accommodate heat expansion and reduce stress cracking
  • OEM-like fit on factory mounts for F10 and F11 520i and 528i with the N20 engine
  • 3D scanned and reverse engineered for precise routing and clearance in the tunnel
  • Reinforced turbo flange with crisscross weld pattern for durability at high heat zones
  • CNC bent tubing to maintain roundness through bends and minimise wall thinning

Engineered for flow, strength and a perfect fit

Stone Exhaust maps the original assembly using 3D scanning, then optimises diameter, bend angles and section lengths for the N20 platform. Heat and pressure behaviour are evaluated before production, resulting in a high flow turbo outlet that efficiently evacuates exhaust gases and supports tuning.

Production utilises multi axis CNC bending for consistent geometry. Overlapping weld techniques at the turbine outlet increase penetration where it matters most, while automated welding arms deliver repeatable accuracy across every unit.

Compatibility

For N20 petrol models

  • BMW 5 Series F10 520i and 528i 2010 to 2013
  • BMW 5 Series F10 LCI 520i and 528i 2012 to 2016
  • BMW 5 Series F11 520i and 528i 2012 to 2013
  • BMW 5 Series F11 LCI 520i and 528i 2013 to 2017

Part number

A206P

Installation

Professional fitting recommended. MJ Modifications in Warwickshire can install this part with care and attention to detail. Request a quote at info@mjmodifications.co.uk.

Manufacturer and warranty

Brand: Stone Exhaust

Warranty: 2 Year Manufacturer Warranty

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