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Genuine BMW B58 Turbo Outlet Gasket/Sealing Ring 18328612538 - Turbo to Downpipe/Front Pipe Exhaust Flange Seal - Fits M140i M240i 340i 440i 540i 740i - OEM Turbocharger Gasket for Decat, Sport Cat or Stock Cat
Genuine BMW B58 Turbo Outlet Gasket/Sealing Ring 18328612538 - Turbo to Downpipe/Front Pipe Exhaust Flange Seal - Fits M140i M240i 340i 440i 540i 740i - OEM Turbocharger Gasket for Decat, Sport Cat or Stock Cat
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Genuine BMW B58 Turbo Outlet Sealing Ring - Part Number 18328612538
Lock in a tight, leak-free joint at the turbocharger outlet with this factory BMW sealing ring for the B58 engine, part number 18328612538. This OE turbo flange gasket sits between the turbo housing and the front pipe, giving a reliable exhaust gas seal whether you are installing a catless pipe, a high flow sports catalyst, or refitting the original converter. It is the correct direct-fit ring for B58 turbo hardware and the only one we trust on performance builds.
Used daily in our workshop and by hundreds of happy customers, this BMW original sealing ring delivers consistent fitment and long-term durability. If you are upgrading the front section or simply refreshing the exhaust joint, replace this ring every time the assembly comes apart to prevent blow-by, fumes and power loss.
Why this BMW B58 turbo flange ring is the smart choice
- Original BMW component for exact fit and dependable sealing
- Correct part reference 18328612538 for B58 turbo outlet
- Ideal for turbo to front pipe connection on modified or stock systems
- Perfect when fitting catless pipes, high flow sports catalysts or the factory cat
- Helps stop exhaust leaks, odours and unwanted noise
- Recommended replacement during any turbo outlet or downpipe swap
Vehicle compatibility
Designed for BMW models running the B58 six-cylinder engine, including:
- BMW M140i
- BMW M240i
- BMW 340i
- BMW 440i
- BMW 540i
- BMW 740i
Use cases
- Turbo outlet to front pipe seal on performance upgrades
- Catless front pipe installations
- High flow sports catalyst conversions
- Refitting the original catalytic converter
What is included
- 1 x BMW B58 turbo outlet sealing ring, part number 18328612538
Professional fitting
Want expert installation and advice on your B58 setup? Book fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.
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