Stone Exhaust BMW B38 F22 F23 F30 F31 Catless Downpipe Upgrade for 218i and 318i — Part Number A238P
Unlock the performance potential of your BMW B38 engine with the Stone Exhaust catless downpipe. Engineered specifically for the BMW 218i and 318i platforms, this high-flow decat downpipe reduces back pressure, improves exhaust gas velocity and enhances turbo efficiency for sharper throttle response and a sportier exhaust note. If you are searching for a BMW B38 downpipe, BMW 218i downpipe, BMW 318i downpipe, BMW F22 F23 F30 F31 catless downpipe or decat downpipe upgrade for the B38 1.5T engine, this Stone Exhaust A238P is the perfect fit.
At Nforcd we have fitted and used Stone Exhaust products ourselves, and our customers consistently report excellent fitment quality, impressive build precision and a noticeable improvement in drivability and sound after installation.
Why choose the Stone Exhaust B38 Catless Downpipe
- Catless downpipe for BMW B38 1.5T engines in 218i and 318i applications
- Unique flex section design to help prevent breakage under extreme heat cycles
- Crisscross welding to strengthen the turbo flange for durability
- One-piece mandrel-bent pipe design for optimal flow
- Precision machine welding by mechanical welding arms for consistent quality
- In-house research and development with 3D scanning and reverse engineering of OEM parts
- 3D flow velocity simulation to optimise gas flow, thermal and pressure zones
- 7-axis CNC bending for exceptional roundness and accuracy
- Integrally moulded pipework with accuracy error under 0.025 mm
- 100% OEM fitment for a straightforward install
Compatibility — BMW B38 Engine
BMW 2 Series
- F22 218i (2012–2017) and F22 LCI 218i (2016–2019)
- F23 218i (2014–2017) and F23 LCI 218i (2016–2019)
BMW 3 Series
- F30 LCI 318i (2015+)
- F31 LCI 318i (2015+)
Engineered for performance
Stone Exhaust employs state-of-the-art 3D flow velocity measurement software and one-piece mandrel-bent pipe design to maximise exhaust turbine efficiency. By using mechanical welding arms for direct, precise spot welding and utilising crisscross and overlapping weld techniques at the turbo flange, this downpipe is built to withstand extreme temperatures at the turbo-to-downpipe junction.
Using 7-axis CNC bending technology, Stone achieves exceptional pipe roundness and accuracy to minimise turbulence, avoid internal weld steps and maintain consistent gas velocity. Combined with 3D scanning and reverse engineering of the OEM part, the Stone Exhaust A238P delivers an OEM-plus fit and a proven performance-focused design for your BMW B38.
Fitting and support
Professional fitting is recommended. For installation by specialists who know BMW platforms inside out, contact Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com.
Warranty
Stone Exhaust 2 Year Warranty
Part Number
A238P
Important notes
This is a catless downpipe. Intended for off-road and track use only where local laws permit. It is the customer’s responsibility to ensure compliance with all applicable regulations.
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