MMR Performance BMW B58 F-Series Silicone Turbo Inlet Hose - Airbox-to-Turbo Intake/Induction Pipe Boot (Bellows/Accordion Delete) - Fits M140i M240i 340i 440i (F20 F21 F22 F23 F30 F31 F32 F36) - High-Flow Smooth-Bore Air Intake Tube Coupler

MMR Performance Silicone Induction Tube for BMW B58 F-series

Transform the way your B58 breathes with this MMR Performance silicone turbo inlet tube. It replaces the factory plastic accordion section between the air filter housing and the compressor inlet, creating a smoother, larger internal pathway that reduces turbulence, sharpens throttle response and adds a deeper induction note. A simple, worthwhile upgrade that supports increased airflow on both standard and tuned cars while tidying up the engine bay with a premium gloss black finish.

Why enthusiasts choose this upgrade

• Direct swap for the stock bellows piece that sits from airbox to turbo entry.
• Smooth-bore, constant inner diameter with stepped ends for uninterrupted flow.
• Durable multi-layer silicone with reinforced sections to resist collapse under heat and load.
• Built-in flexibility so the engine can move without stressing joints or clamps.
• Improved intake sound with a cleaner OEM-plus look in the bay.
• Quick, hassle-free fitment in roughly 10 minutes using basic hand tools. Fully reversible.

Compatible BMW models

Designed for BMW F-series B58 vehicles:

• M140i
• M240i
• 340i
• 440i

Pair it with your preferred intake setup

Works brilliantly with the original airbox and standard turbo elbow, and complements panel filters and full cold air intake kits from MMR Performance and other reputable brands. Deleting the factory accordion hose unlocks the airflow your turbo wants, letting other breathing mods do their job.

Tried, fitted and loved by our customers

We run this MMR silicone inlet tube on our own B58 builds and have fitted it to many customer cars. Feedback is consistently positive, with owners reporting crisper pedal response, smoother spool-up and a more purposeful intake sound. It is a small change that delivers a noticeable difference every drive.

Fitting and support

Prefer professional installation? Book in with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and expert advice.

Note: Hose clamps are not included. The original BMW clips can be reused.

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