AIRTEC Motorsport De-Cat Downpipe for BMW B58 Engine
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Upgrade your BMW B58 platform with the AIRTEC Motorsport De-Cat Downpipe — designed to improve exhaust flow, turbo response and overall engine performance.
By replacing the restrictive OEM catalytic downpipe, back pressure is significantly reduced, allowing the turbocharger to spool faster and improving throttle response, power delivery and exhaust sound.
Manufactured from high-quality stainless steel with smooth-flow bends and cast sections to maintain optimal diameter and airflow, this downpipe is suitable for both OEM and aftermarket exhaust systems.
Developed by AIRTEC Motorsport in the UK for performance-oriented BMW B58 builds.
Features: • High-flow de-cat downpipe for BMW B58 platform
* Reduced exhaust back pressure
* Faster turbo spool and improved throttle response
* More aggressive exhaust sound
* Stainless steel construction
* Smooth bends for improved exhaust flow
* Compatible with OEM and aftermarket exhaust systems
* AIRTEC laser-cut plaque
* Ideal for tuned and Stage 2 B58 setups
Fitment: • BMW M140i (F20/F21)
* BMW M240i (F22/F23)
* BMW 340i (F30/F31)
* BMW 440i (F32/F33/F36)
* BMW 540i (G30/G31/G38)
* BMW 640i GT (G32)
* BMW 740i (G12)
* BMW X3 M40i (G01)
* BMW X4 M40i (G02)
An excellent upgrade for B58 owners looking for improved turbo response, increased performance and a more aggressive driving experience.
Available on request.
Estimated EU delivery: 7–14 business days.