Stone Exhaust Catless Downpipe for BMW B48 — G20 G21 320i 330i, G30 G31 520i 530i, G01 G02 X3 X4 20i 30i xDrive, G29 Z4 20i 30i, G32 630i GT, G11 730i
Upgrade your BMW B48 turbo engine with the Stone Exhaust catless downpipe A216P. This de-cat downpipe is engineered for maximum exhaust flow, faster turbo response and a sharper, more engaging sound. If you are searching for BMW B48 downpipe, BMW 330i downpipe, BMW 530i downpipe, BMW G20 downpipe, BMW G30 downpipe, BMW X3 X4 downpipe, or BMW Z4 30i decat in the UK, this Stone Exhaust catless downpipe is the performance downpipe you want for your 2.0 turbo BMW.
We have supplied and fitted Stone Exhaust B48 downpipes on customer cars and in our own builds. Fitment is spot on, the quality is superb and feedback on sound and response has been consistently positive. For anyone looking for a BMW 320i 330i decat, BMW 520i 530i decat or BMW X3 X4 30i decat, this is a proven, high quality choice.
Why choose this BMW B48 catless downpipe
- Catless downpipe designed for B48 engine BMWs including 320i, 330i, 520i, 530i, X3 20i xDrive, X3 30i xDrive, X4 20i xDrive, X4 30i xDrive, Z4 20i, Z4 30i and 730i.
- One-piece mandrel bent design for smooth, uninterrupted flow and reduced back pressure.
- 3D flow velocity measurement and simulation to optimise gas speed, pressure and thermal zones.
- Reverse engineered from OEM components via 3D scanning for 100% OEM-like fitment.
- 7-axis CNC bending achieves an industry-leading 98% roundness and exceptional dimensional accuracy, helping to prevent flow restriction.
- Crisscross and overlapping welding on the turbo flange to strengthen the hottest, highest-stress joint.
- Direct spot welding using mechanical welding arms for precise, consistent weld penetration and durability.
- In-house R&D and quality control by Stone Exhaust for reliable, repeatable performance.
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Compatibility — B48 engine
BMW 3 Series
- G20 320i / 330i (2017+)
- G21 320i / 330i / 330i xDrive (2018+)
BMW 5 Series
- G30 520i (2016–2019)
- G30 530i / 530i xDrive (2015–2019)
- G31 520i (2016–2019)
- G31 530i / 530i xDrive (2016–2019)
BMW 6 Series
- G32 630i GT (2017+)
BMW 7 Series
- G11 730i (2014–2019)
BMW X Series
- G01 X3 20i xDrive (2017–2018) / X3 30i xDrive (2016–2018)
- G02 X4 20i xDrive (2017–2019) / X4 30i xDrive (2017–2019)
BMW Z Series
- G29 Z4 20i (2019+) / Z4 30i (2017+)
Engineering detail
- 3D scanning and reverse engineering of OEM parts to refine pipe diameter, routing and bend angles.
- 3D simulation focuses on exhaust gas movement, thermal behaviour and pressure rise zones to maximise turbine efficiency.
- 7-axis CNC bending and one-piece construction reduce weld points to avoid vapour lock and turbulence.
- Accuracy error under 0.025 mm helps ensure repeatable, OEM-like installation.
- Crisscross and overlapping welds increase width and penetration for endurance at extreme temperatures.
Fitment and installation
Professional installation recommended. We offer in-house fitting at Nforcd in Warwickshire. For a bespoke fitting quote or to check workshop availability, email Sales@nforcd.com.
Part number
A216P
Warranty
Stone Exhaust 2 Year Warranty
Notes on use and emissions
This is a catless downpipe. It is intended for off-road and track use where permitted. Laws vary by region regarding removal or modification of catalytic converters. Please check and comply with all applicable local regulations before purchase and installation. Engine management calibration may be required on some vehicles.
Why buy from Nforcd
UK stockists of performance car parts with hands-on installation experience. We have used this Stone Exhaust BMW B48 catless downpipe ourselves and our customers have been delighted with the fit, finish and results. Shop with confidence for your BMW 320i, 330i, 520i, 530i, X3 30i, X4 30i, Z4 30i or 730i downpipe upgrade.