Stone Exhaust BMW B58 Catless Performance Downpipe - F20 F21 F22 F23 F30 F31 F32 F33 F36 G11 G12 G30 G31 G02 G05 G06 G29
The Stone Exhaust catless downpipe for the BMW B58 is the go-to performance downpipe upgrade for drivers who want maximum exhaust flow, maximum durability and 100% OEM-style fitment. Engineered using 3D scanning, reverse engineering and precision robot welding, this B58 catless downpipe unlocks exhaust efficiency and turbo flow on BMW M140i, M240i, 340i, 440i, 540i, 740i, X3 M40i, X4 M40i, X5 40i, X6 40i and Z4 M40i models. It is a one-piece, machine-welded, decat downpipe designed to outperform typical multi-piece designs.
At Nforcd we have fitted and used these Stone Exhaust B58 downpipes on customer cars and our own. Fitment has been spot on and feedback has been consistently excellent on quality, finish and performance feel. If you are searching for BMW B58 downpipe, BMW M140i downpipe, M240i downpipe, 340i downpipe, 440i downpipe, 540i downpipe, 740i downpipe, X3 M40i downpipe, X4 M40i downpipe, Z4 M40i downpipe, catless downpipe, decat downpipe or B58 decat in the UK, this is the solution we recommend.
Why choose the Stone Exhaust B58 catless downpipe
- Catless decat design for maximum exhaust gas flow and reduced back pressure
- One-piece CNC bent tubing to eliminate multiple welds inside the pipe that can disrupt flow
- Unique flex section designed to help prevent breakage from extreme heat cycles
- Crisscross and overlapping welds at the turbo flange to strengthen the hottest, most stressed joint
- Robot-assisted machine welding for accuracy and penetration without ash inside the pipe wall
- 3D scanning and reverse engineering of OEM parts to ensure 100% OEM fitment and correct routing
Engineering that makes a difference
Stone Exhaust uses flow velocity measurement and 3D simulation to analyse gas movement, thermal zones and pressure rise, refining until optimal performance is reached. With a 7-axis CNC bending machine, pipe roundness is maintained to industry-leading levels, minimising ovalisation at tight bends and preventing airflow obstruction and welding fracture issues seen on typical multi-piece designs. Combined with mechanical welding arms for direct spot welding, the result is a robust, integrally moulded downpipe with exceptional accuracy.
Key features
- Catless downpipe for BMW B58 models including M140i, M240i, 340i, 440i, 540i, 740i, X3 M40i, X4 M40i, X5 40i xDrive and X6 40i xDrive
- Unique flex design to help manage heat stress
- Crisscross welding to strengthen turbo flange
- One-piece design for smooth internal flow
- Precision machine welding using mechanical arms
- In-house research and development
- 3D scanning and reverse engineering
- 100% OEM fitment
Compatibility - BMW B58 engine models
BMW 1 Series
- F20 LCI / F21 LCI M140i / M140i xDrive (2015+)
BMW 2 Series
- F22 M240i / M240i xDrive (2015+)
- F22 LCI M240i / M240i xDrive (2016+)
- F23 M240i / M240i xDrive (2015+)
- F23 LCI M240i / M240i xDrive (2016+)
BMW 3 Series
- F30 LCI / F31 LCI 340i / 340i xDrive (2014+)
BMW 4 Series
- F32 440i / 440i xDrive (2015+)
- F32 LCI 440i / 440i xDrive (2016+)
- F33 440i / 440i xDrive (2015+)
- F33 LCI 440i / 440i xDrive (2016+)
- F36 440i / 440i xDrive (2015+)
- F36 LCI 440i / 440i xDrive (2016+)
BMW 5 Series
- G30 540i / 540i xDrive (2015+)
- G31 540i xDrive (2016+)
BMW 7 Series
- G11 740i (2014+)
- G12 740i (2014+) / 740i xDrive (2015+)
- G12 740Li (2014+) / 740Li xDrive (2015+)
BMW X Series
- G02 X4 / X3 M40i xDrive (2017+)
- G05 X5 40i xDrive (2017+)
- G06 X6 40i xDrive (2018+)
BMW Z Series
- G29 Z4 M40i (2019+)
Part number
A214P
Fitting and support
Professional installation available at Nforcd in Warwickshire. For a fitting quote or to discuss your BMW B58 downpipe upgrade, email Sales@nforcd.com.
Manufactured by
Stone Exhaust
Warranty
Stone Exhaust 2 year warranty
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